Josephgflowers/Differential-Attention-Liquid-Metal-Tinyllama
1B • Updated • 4 • 3
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the third gravitational-wave transient catalog (gwtc-3) describes signals detected with advanced ligo and advanced virgo up to the end of their third observing run. updating the previous gwtc-2.1, we present candidate gravitational waves from compact binary coalescences during the second half of the third observing run... | gwtc-3: compact binary coalescences observed by ligo and virgo during the second part of the third observing run |
context. we present the second gaia data release, gaia dr2, consisting of astrometry, photometry, radial velocities, and information on astrophysical parameters and variability, for sources brighter than magnitude 21. in addition epoch astrometry and photometry are provided for a modest sample of minor planets in the s... | gaia data release 2. summary of the contents and survey properties |
on september 14, 2015 at 09:50:45 utc the two detectors of the laser interferometer gravitational-wave observatory simultaneously observed a transient gravitational-wave signal. the signal sweeps upwards in frequency from 35 to 250 hz with a peak gravitational-wave strain of 1.0 ×10-21. it matches the waveform predicte... | observation of gravitational waves from a binary black hole merger |
we present the results from three gravitational-wave searches for coalescing compact binaries with component masses above 1 m⊙ during the first and second observing runs of the advanced gravitational-wave detector network. during the first observing run (o 1 ), from september 12, 2015 to january 19, 2016, gravitational... | gwtc-1: a gravitational-wave transient catalog of compact binary mergers observed by ligo and virgo during the first and second observing runs |
on august 17, 2017 at 12∶41:04 utc the advanced ligo and advanced virgo gravitational-wave detectors made their first observation of a binary neutron star inspiral. the signal, gw170817, was detected with a combined signal-to-noise ratio of 32.4 and a false-alarm-rate estimate of less than one per 8.0 ×104 years . we i... | gw170817: observation of gravitational waves from a binary neutron star inspiral |
context. we present the early installment of the third gaia data release, gaia edr3, consisting of astrometry and photometry for 1.8 billion sources brighter than magnitude 21, complemented with the list of radial velocities from gaia dr2.aims: a summary of the contents of gaia edr3 is presented, accompanied by a discu... | gaia early data release 3. summary of the contents and survey properties |
context. we present the third data release of the european space agency's gaia mission, gaia dr3. this release includes a large variety of new data products, notably a much expanded radial velocity survey and a very extensive astrophysical characterisation of gaia sources.aims: we outline the content and the properties... | gaia data release 3. summary of the content and survey properties |
pan-starrs1 has carried out a set of distinct synoptic imaging sky surveys including the $3\pi$ steradian survey and the medium deep survey in 5 bands ($grizy_{p1}$). the mean 5$\sigma$ point source limiting sensitivities in the stacked 3$\pi$ steradian survey in $grizy_{p1}$ are (23.3, 23.2, 23.1, 22.3, 21.4) respecti... | the pan-starrs1 surveys |
we report on the population properties of compact binary mergers inferred from gravitational-wave observations of these systems during the first three ligo-virgo observing runs. the gravitational-wave transient catalog 3 (gwtc-3) contains signals consistent with three classes of binary mergers: binary black hole, binar... | population of merging compact binaries inferred using gravitational waves through gwtc-3 |
we describe here the most ambitious survey currently planned in the optical, the large synoptic survey telescope (lsst). the lsst design is driven by four main science themes: probing dark energy and dark matter, taking an inventory of the solar system, exploring the transient optical sky, and mapping the milky way. ls... | lsst: from science drivers to reference design and anticipated data products |
we report on gravitational-wave discoveries from compact binary coalescences detected by advanced ligo and advanced virgo in the first half of the third observing run (o3a) between 1 april 2019 15 ∶00 utc and 1 october 2019 15 ∶00 utc. by imposing a false-alarm-rate threshold of two per year in each of the four search ... | gwtc-2: compact binary coalescences observed by ligo and virgo during the first half of the third observing run |
on 2017 august 17 a binary neutron star coalescence candidate (later designated gw170817) with merger time 12:41:04 utc was observed through gravitational waves by the advanced ligo and advanced virgo detectors. the fermi gamma-ray burst monitor independently detected a gamma-ray burst (grb 170817a) with a time delay o... | multi-messenger observations of a binary neutron star merger |
observing and timing a group of millisecond pulsars with high rotational stability enables the direct detection of gravitational waves (gws). the gw signals can be identified from the spatial correlations encoded in the times-of-arrival of widely spaced pulsar-pairs. the chinese pulsar timing array (cpta) is a collabor... | searching for the nano-hertz stochastic gravitational wave background with the chinese pulsar timing array data release i |
on 2017 august 17, the gravitational-wave event gw170817 was observed by the advanced ligo and virgo detectors, and the gamma-ray burst (grb) grb 170817a was observed independently by the fermi gamma-ray burst monitor, and the anti-coincidence shield for the spectrometer for the international gamma-ray astrophysics lab... | gravitational waves and gamma-rays from a binary neutron star merger: gw170817 and grb 170817a |
we report the observation of a gravitational-wave signal produced by the coalescence of two stellar-mass black holes. the signal, gw151226, was observed by the twin detectors of the laser interferometer gravitational-wave observatory (ligo) on december 26, 2015 at 03:38:53 utc. the signal was initially identified withi... | gw151226: observation of gravitational waves from a 22-solar-mass binary black hole coalescence |
axions comprise a broad class of particles that can play a major role in explaining the unknown aspects of cosmology. they are also well-motivated within high energy physics, appearing in theories related to cp-violation in the standard model, supersymmetric theories, and theories with extra-dimensions, including strin... | axion cosmology |
we present the first event horizon telescope (eht) observations of sagittarius a* (sgr a*), the galactic center source associated with a supermassive black hole. these observations were conducted in 2017 using a global interferometric array of eight telescopes operating at a wavelength of λ = 1.3 mm. the eht data resol... | first sagittarius a* event horizon telescope results. i. the shadow of the supermassive black hole in the center of the milky way |
on august 17, 2017, the advanced ligo and advanced virgo gravitational-wave detectors observed a low-mass compact binary inspiral. the initial sky localization of the source of the gravitational-wave signal, gw170817, allowed electromagnetic observatories to identify ngc 4993 as the host galaxy. in this work, we improv... | properties of the binary neutron star merger gw170817 |
we present an improved determination of the hubble constant from hubble space telescope (hst) observations of 70 long-period cepheids in the large magellanic cloud (lmc). these were obtained with the same wfc3 photometric system used to measure extragalactic cepheids in the hosts of sne ia. gyroscopic control of hst wa... | large magellanic cloud cepheid standards provide a 1% foundation for the determination of the hubble constant and stronger evidence for physics beyond λcdm |
the ever-increasing number of detections of gravitational waves (gws) from compact binaries by the advanced ligo and advanced virgo detectors allows us to perform ever-more sensitive tests of general relativity (gr) in the dynamical and strong-field regime of gravity. we perform a suite of tests of gr using the compact... | tests of general relativity with gwtc-3 |
we report the observation of a compact binary coalescence involving a 22.2-24.3 m⊙ black hole and a compact object with a mass of 2.50-2.67 m⊙ (all measurements quoted at the 90% credible level). the gravitational-wave signal, gw190814, was observed during ligo's and virgo's third observing run on 2019 august 14 at 21:... | gw190814: gravitational waves from the coalescence of a 23 solar mass black hole with a 2.6 solar mass compact object |
stellar distances constitute a foundational pillar of astrophysics. the publication of 1.47 billion stellar parallaxes from gaia is a major contribution to this. despite gaia's precision, the majority of these stars are so distant or faint that their fractional parallax uncertainties are large, thereby precluding a sim... | estimating distances from parallaxes. v. geometric and photogeometric distances to 1.47 billion stars in gaia early data release 3 |
we describe the observation of gw170104, a gravitational-wave signal produced by the coalescence of a pair of stellar-mass black holes. the signal was measured on january 4, 2017 at 10∶11:58.6 utc by the twin advanced detectors of the laser interferometer gravitational-wave observatory during their second observing run... | gw170104: observation of a 50-solar-mass binary black hole coalescence at redshift 0.2 |
on 17 august 2017, the ligo and virgo observatories made the first direct detection of gravitational waves from the coalescence of a neutron star binary system. the detection of this gravitational-wave signal, gw170817, offers a novel opportunity to directly probe the properties of matter at the extreme conditions foun... | gw170817: measurements of neutron star radii and equation of state |
on 2019 april 25, the ligo livingston detector observed a compact binary coalescence with signal-to-noise ratio 12.9. the virgo detector was also taking data that did not contribute to detection due to a low signal-to-noise ratio, but were used for subsequent parameter estimation. the 90% credible intervals for the com... | gw190425: observation of a compact binary coalescence with total mass ∼ 3.4 m⊙ |
we present 12 new agn at 4<z<7 in the jades survey (in addition to the previously identified agn in gn-z11 at z=10.6) revealed through the detection of a broad line region as seen in halpha. the depth of jades, together with the use of three different spectral resolutions, enables us to probe a lower mass regime ... | jades. the diverse population of infant black holes at 4<z<11: merging, tiny, poor, but mighty |
we introduce the virgo consortium's evolution and assembly of galaxies and their environments (eagle) project, a suite of hydrodynamical simulations that follow the formation of galaxies and supermassive black holes in cosmologically representative volumes of a standard λ cold dark matter universe. we discuss the limit... | the eagle project: simulating the evolution and assembly of galaxies and their environments |
the transiting exoplanet survey satellite (tess) will search for planets transiting bright and nearby stars. tess has been selected by nasa for launch in 2017 as an astrophysics explorer mission. the spacecraft will be placed into a highly elliptical 13.7-day orbit around the earth. during its 2-year mission, tess will... | transiting exoplanet survey satellite (tess) |
despite its importance to our understanding of physics at supranuclear densities, the equation of state (eos) of matter deep within neutron stars remains poorly understood. millisecond pulsars (msps) are among the most useful astrophysical objects in the universe for testing fundamental physics, and place some of the m... | relativistic shapiro delay measurements of an extremely massive millisecond pulsar |
for the vast majority of stars in the second gaia data release, reliable distances cannot be obtained by inverting the parallax. a correct inference procedure must instead be used to account for the nonlinearity of the transformation and the asymmetry of the resulting probability distribution. here, we infer distances ... | estimating distance from parallaxes. iv. distances to 1.33 billion stars in gaia data release 2 |
on august 14, 2017 at 10∶30:43 utc, the advanced virgo detector and the two advanced ligo detectors coherently observed a transient gravitational-wave signal produced by the coalescence of two stellar mass black holes, with a false-alarm rate of ≲1 in 27 000 years. the signal was observed with a three-detector network ... | gw170814: a three-detector observation of gravitational waves from a binary black hole coalescence |
psr j0740+6620 has a gravitational mass of 2.08 ± 0.07 m⊙, which is the highest reliably determined mass of any neutron star. as a result, a measurement of its radius will provide unique insight into the properties of neutron star core matter at high densities. here we report a radius measurement based on fits of rotat... | the radius of psr j0740+6620 from nicer and xmm-newton data |
we report on bayesian estimation of the radius, mass, and hot surface regions of the massive millisecond pulsar psr j0740+6620, conditional on pulse-profile modeling of neutron star interior composition explorer x-ray timing instrument event data. we condition on informative pulsar mass, distance, and orbital inclinati... | a nicer view of the massive pulsar psr j0740+6620 informed by radio timing and xmm-newton spectroscopy |
we review the landscape of qcd axion models. theoretical constructions that extend the window for the axion mass and couplings beyond conventional regions are highlighted and classified. bounds from cosmology, astrophysics and experimental searches are reexamined and updated. | corrigendum to "the landscape of qcd axion models" [phys. rep. 870 (2020) 1-117] |
this paper documents the 16th data release (dr16) from the sloan digital sky surveys (sdss), the fourth and penultimate from the fourth phase (sdss-iv). this is the first release of data from the southern hemisphere survey of the apache point observatory galactic evolution experiment 2 (apogee-2); new data from apogee-... | the 16th data release of the sloan digital sky surveys: first release from the apogee-2 southern survey and full release of eboss spectra |
we substantially update the capabilities of the open-source software instrument modules for experiments in stellar astrophysics (mesa). mesa can now simultaneously evolve an interacting pair of differentially rotating stars undergoing transfer and loss of mass and angular momentum, greatly enhancing the prior ability t... | modules for experiments in stellar astrophysics (mesa): binaries, pulsations, and explosions |
this report describes the 2014 study by the science definition team (sdt) of the wide-field infrared survey telescope (wfirst) mission. it is a space observatory that will address the most compelling scientific problems in dark energy, exoplanets and general astrophysics using a 2.4-m telescope with a wide-field infrar... | wide-field infrarred survey telescope-astrophysics focused telescope assets wfirst-afta 2015 report |
context. at about 1000 days after the launch of gaia we present the first gaia data release, gaia dr1, consisting of astrometry and photometry for over 1 billion sources brighter than magnitude 20.7.aims: a summary of gaia dr1 is presented along with illustrations of the scientific quality of the data, followed by a di... | gaia data release 1. summary of the astrometric, photometric, and survey properties |
we report on the population of 47 compact binary mergers detected with a false-alarm rate of < $1\,{\mathrm{yr}}^{-1}$ in the second ligo-virgo gravitational-wave transient catalog. we observe several characteristics of the merging binary black hole (bbh) population not discernible until now. first, the primary mass... | population properties of compact objects from the second ligo-virgo gravitational-wave transient catalog |
we report a precision measurement of the parity-violating asymmetry apv in the elastic scattering of longitudinally polarized electrons from 208pb. we measure apv=550 ±16 (stat) ±8 (syst) parts per billion, leading to an extraction of the neutral weak form factor fw(q2=0.00616 gev2)=0.368 ±0.013 . combined with our pre... | accurate determination of the neutron skin thickness of 208pb through parity-violation in electron scattering |
neutron stars are not only of astrophysical interest, but are also of great interest to nuclear physicists because their attributes can be used to determine the properties of the dense matter in their cores. one of the most informative approaches for determining the equation of state (eos) of this dense matter is to me... | psr j0030+0451 mass and radius from nicer data and implications for the properties of neutron star matter |
this is the first of a series of papers presenting the modules for experiments in stellar astrophysics (mesa) isochrones and stellar tracks (mist) project, a new comprehensive set of stellar evolutionary tracks and isochrones computed using mesa, a state-of-the-art open-source 1d stellar evolution package. in this work... | mesa isochrones and stellar tracks (mist). i. solar-scaled models |
the third generation of the sloan digital sky survey (sdss-iii) took data from 2008 to 2014 using the original sdss wide-field imager, the original and an upgraded multi-object fiber-fed optical spectrograph, a new near-infrared high-resolution spectrograph, and a novel optical interferometer. all of the data from sdss... | the eleventh and twelfth data releases of the sloan digital sky survey: final data from sdss-iii |
this paper documents the seventeenth data release (dr17) from the sloan digital sky surveys; the fifth and final release from the fourth phase (sdss-iv). dr17 contains the complete release of the mapping nearby galaxies at apache point observatory (manga) survey, which reached its goal of surveying over 10,000 nearby g... | the seventeenth data release of the sloan digital sky surveys: complete release of manga, mastar, and apogee-2 data |
we report on bayesian parameter estimation of the mass and equatorial radius of the millisecond pulsar psr j0030+0451, conditional on pulse-profile modeling of neutron star interior composition explorer x-ray spectral-timing event data. we perform relativistic ray-tracing of thermal emission from hot regions of the pul... | a nicer view of psr j0030+0451: millisecond pulsar parameter estimation |
on the strength of a double nobel prize winning experiment (super)kamiokande and an extremely successful long baseline neutrino programme, the third generation water cherenkov detector, hyper-kamiokande, is being developed by an international collaboration as a leading worldwide experiment based in japan. the hyper-kam... | hyper-kamiokande design report |
the jiangmen underground neutrino observatory (juno), a 20 kton multi-purpose underground liquid scintillator detector, was proposed with the determination of the neutrino mass hierarchy (mh) as a primary physics goal. the excellent energy resolution and the large fiducial volume anticipated for the juno detector offer... | neutrino physics with juno |
we update the capabilities of the software instrument modules for experiments in stellar astrophysics (mesa) and enhance its ease of use and availability. our new approach to locating convective boundaries is consistent with the physics of convection, and yields reliable values of the convective-core mass during both h... | modules for experiments in stellar astrophysics (mesa): convective boundaries, element diffusion, and massive star explosions |
we introduce an updated physical model to simulate the formation and evolution of galaxies in cosmological, large-scale gravity+magnetohydrodynamical simulations with the moving mesh code arepo. the overall framework builds upon the successes of the illustris galaxy formation model, and includes prescriptions for star ... | simulating galaxy formation with the illustristng model |
characterising the prevalence and properties of faint active galactic nuclei (agn) in the early universe is key for understanding the formation of supermassive black holes (smbhs) and determining their role in cosmic reionization. we perform a spectroscopic search for broad h$\alpha$ emitters at $z\approx4-6$ using dee... | little red dots: an abundant population of faint agn at z~5 revealed by the eiger and fresco jwst surveys |
we present possible observing scenarios for the advanced ligo, advanced virgo and kagra gravitational-wave detectors over the next decade, with the intention of providing information to the astronomy community to facilitate planning for multi-messenger astronomy with gravitational waves. we estimate the sensitivity of ... | prospects for observing and localizing gravitational-wave transients with advanced ligo, advanced virgo and kagra |
we update the capabilities of the open-knowledge software instrument modules for experiments in stellar astrophysics (mesa). rsp is a new functionality in mesastar that models the nonlinear radial stellar pulsations that characterize rr lyrae, cepheids, and other classes of variable stars. we significantly enhance nume... | modules for experiments in stellar astrophysics (mesa): pulsating variable stars, rotation, convective boundaries, and energy conservation |
we report the observation of gravitational waves from two compact binary coalescences in ligo's and virgo's third observing run with properties consistent with neutron star-black hole (nsbh) binaries. the two events are named gw200105_162426 and gw200115_042309, abbreviated as gw200105 and gw200115; the first was obser... | observation of gravitational waves from two neutron star-black hole coalescences |
context. gaia early data release 3 (gaia edr3) gives trigonometric parallaxes for nearly 1.5 billion sources. inspection of the edr3 data for sources identified as quasars reveals that their parallaxes are biased, that is, they are systematically offset from the expected distribution around zero, by a few tens of micro... | gaia early data release 3. parallax bias versus magnitude, colour, and position |
hypothetical low-mass particles, such as axions, provide a compelling explanation for the dark matter in the universe. such particles are expected to emerge abundantly from the hot interior of stars. to test this prediction, the cern axion solar telescope (cast) uses a 9 t refurbished large hadron collider test magnet ... | new cast limit on the axion-photon interaction |
we report results from continued timing observations of psr j0740+6620, a high-mass, 2.8 ms radio pulsar in orbit with a likely ultracool white dwarf companion. our data set consists of combined pulse arrival-time measurements made with the 100 m green bank telescope and the canadian hydrogen intensity mapping experime... | refined mass and geometric measurements of the high-mass psr j0740+6620 |
the apache point observatory galactic evolution experiment (apogee), one of the programs in the sloan digital sky survey iii (sdss-iii), has now completed its systematic, homogeneous spectroscopic survey sampling all major populations of the milky way. after a three-year observing campaign on the sloan 2.5 m telescope,... | the apache point observatory galactic evolution experiment (apogee) |
hydrodynamical simulations of galaxy formation have now reached sufficient volume to make precision predictions for clustering on cosmologically relevant scales. here, we use our new illustristng simulations to study the non-linear correlation functions and power spectra of baryons, dark matter, galaxies, and haloes ov... | first results from the illustristng simulations: matter and galaxy clustering |
the illustristng project is a new suite of cosmological magnetohydrodynamical simulations of galaxy formation performed with the arepo code and updated models for feedback physics. here, we introduce the first two simulations of the series, tng100 and tng300, and quantify the stellar mass content of about 4000 massive ... | first results from the illustristng simulations: the stellar mass content of groups and clusters of galaxies |
we describe the sloan digital sky survey iv (sdss-iv), a project encompassing three major spectroscopic programs. the apache point observatory galactic evolution experiment 2 (apogee-2) is observing hundreds of thousands of milky way stars at high resolution and high signal-to-noise ratios in the near-infrared. the map... | sloan digital sky survey iv: mapping the milky way, nearby galaxies, and the distant universe |
we present a new three-dimensional map of dust reddening, based on gaia parallaxes and stellar photometry from pan-starrs 1 and 2mass. this map covers the sky north of a decl. of -30°, out to a distance of a few kiloparsecs. this new map contains three major improvements over our previous work. first, the inclusion of ... | a 3d dust map based on gaia, pan-starrs 1, and 2mass |
many aspects of the large-scale structure of the universe can be described successfully using cosmological models in which 27 ±1 % of the critical mass-energy density consists of cold dark matter (cdm). however, few—if any—of the predictions of cdm models have been successful on scales of ∼10 kpc or less. this lack of ... | ultralight scalars as cosmological dark matter |
in the last few years, graph neural networks (gnns) have become the standard toolkit for analyzing and learning from data on graphs. this emerging field has witnessed an extensive growth of promising techniques that have been applied with success to computer science, mathematics, biology, physics and chemistry. but for... | benchmarking graph neural networks |
we present the full public release of all data from the tng100 and tng300 simulations of the illustristng project. illustristng is a suite of large volume, cosmological, gravo-magnetohydrodynamical simulations run with the moving-mesh code arepo. tng includes a comprehensive model for galaxy formation physics, and each... | the illustristng simulations: public data release |
we present a method to flexibly and self-consistently determine individual galaxies' star formation rates (sfrs) from their host haloes' potential well depths, assembly histories, and redshifts. the method is constrained by galaxies' observed stellar mass functions, sfrs (specific and cosmic), quenched fractions, ultra... | universemachine: the correlation between galaxy growth and dark matter halo assembly from z = 0-10 |
the dark energy spectroscopic instrument (desi) completed its five-month survey validation in may 2021. spectra of stellar and extragalactic targets from survey validation constitute the first major data sample from the desi survey. this paper describes the public release of those spectra, the catalogs of derived prope... | the early data release of the dark energy spectroscopic instrument |
on 2017 june 8 at 02:01:16.49 utc, a gravitational-wave (gw) signal from the merger of two stellar-mass black holes was observed by the two advanced laser interferometer gravitational-wave observatory detectors with a network signal-to-noise ratio of 13. this system is the lightest black hole binary so far observed, wi... | gw170608: observation of a 19 solar-mass binary black hole coalescence |
we present results on the mass, spin, and redshift distributions with phenomenological population models using the 10 binary black hole (bbh) mergers detected in the first and second observing runs completed by advanced ligo and advanced virgo. we constrain properties of the bbh mass spectrum using models with a range ... | binary black hole population properties inferred from the first and second observing runs of advanced ligo and advanced virgo |
kagome metals a v3sb5 (a =k , rb, and cs) exhibit intriguing superconductivity below 0.9 ∼2.5 k , a charge density wave (cdw) transition around 80 ∼100 k , and z2 topological surface states. the nature of the cdw phase and its relation to superconductivity remains elusive. in this work, we investigate the electronic an... | charge density waves and electronic properties of superconducting kagome metals |
erosita (extended roentgen survey with an imaging telescope array) is the primary instrument on the spectrum-roentgen-gamma (srg) mission, which was successfully launched on july 13, 2019, from the baikonour cosmodrome. after the commissioning of the instrument and a subsequent calibration and performance verification ... | the erosita x-ray telescope on srg |
we introduce the first two simulations of the illustristng project, a next generation of cosmological magnetohydrodynamical simulations, focusing on the optical colours of galaxies. we explore tng100, a rerun of the original illustris box, and tng300, which includes 2 × 25003 resolution elements in a volume 20 times la... | first results from the illustristng simulations: the galaxy colour bimodality |
we present an investigation into the first 500 myr of galaxy evolution from the cosmic evolution early release science (ceers) survey. ceers, one of 13 jwst ers programs, targets galaxy formation from z ~ 0.5 to >10 using several imaging and spectroscopic modes. we make use of the first epoch of ceers nircam imaging... | ceers key paper. i. an early look into the first 500 myr of galaxy formation with jwst |
casa, the common astronomy software applications, is the primary data processing software for the atacama large millimeter/submillimeter array (alma) and the karl g. jansky very large array (vla), and is frequently used also for other radio telescopes. the casa software can handle data from single-dish, aperture-synthe... | casa, the common astronomy software applications for radio astronomy |
one aim of modern astronomy is to detect temperate, earth-like exoplanets that are well suited for atmospheric characterization. recently, three earth-sized planets were detected that transit (that is, pass in front of) a star with a mass just eight per cent that of the sun, located 12 parsecs away. the transiting conf... | seven temperate terrestrial planets around the nearby ultracool dwarf star trappist-1 |
jwst is revealing a new population of dust-reddened broad-line active galactic nuclei (agn) at redshifts $z\gtrsim5$. here we present deep nirspec/prism spectroscopy from the cycle 1 treasury program uncover of 15 agn candidates selected to be compact, with red continua in the rest-frame optical but with blue slopes in... | uncover spectroscopy confirms a surprising ubiquity of agn in red galaxies at $z>5$ |
we report results from searches for new physics with low-energy electronic recoil data recorded with the xenon1t detector. with an exposure of 0.65 tonne-years and an unprecedentedly low background rate of 76 ±2stat events /(tonne ×year ×kev ) between 1 and 30 kev, the data enable one of the most sensitive searches for... | excess electronic recoil events in xenon1t |
at present, we have almost as many theories to explain fast radio bursts as we have fast radio bursts observed. this landscape will be changing rapidly with chime/frb, recently commissioned in canada, and hirax, under construction in south africa. this is an opportune time to review existing theories and their observat... | a living theory catalogue for fast radio bursts |
magnetars are highly magnetized young neutron stars that occasionally produce enormous bursts and flares of x-rays and γ-rays1. of the approximately thirty magnetars currently known in our galaxy and the magellanic clouds, five have exhibited transient radio pulsations2,3. fast radio bursts (frbs) are millisecond-durat... | a bright millisecond-duration radio burst from a galactic magnetar |
the assembly of our galaxy can be reconstructed using the motions and chemistry of individual stars1,2. chemo-dynamical studies of the stellar halo near the sun have indicated the presence of multiple components3, such as streams4 and clumps5, as well as correlations between the stars' chemical abundances and orbital p... | the merger that led to the formation of the milky way's inner stellar halo and thick disk |
since their discovery in 20071, much effort has been devoted to uncovering the sources of the extragalactic, millisecond-duration fast radio bursts (frbs)2. a class of neutron stars known as magnetars is a leading candidate source of frbs3,4. magnetars have surface magnetic fields in excess of 1014 gauss, the decay of ... | a fast radio burst associated with a galactic magnetar |
multi-epoch radial velocity measurements of stars can be used to identify stellar, substellar, and planetary-mass companions. even a small number of observation epochs can be informative about companions, though there can be multiple qualitatively different orbital solutions that fit the data. we have custom-built a mo... | binary companions of evolved stars in apogee dr14: search method and catalog of ∼5000 companions |
we conduct a comprehensive study on dropout galaxy candidates at z ~ 9-16 using the first 90 arcmin2 james webb space telescope (jwst) near infrared camera images taken by the early release observations (ero) and early release science programs. with the jwst simulation images, we find that a number of foreground interl... | a comprehensive study of galaxies at z 9-16 found in the early jwst data: ultraviolet luminosity functions and cosmic star formation history at the pre-reionization epoch |
our galaxy, the milky way, is a benchmark for understanding disk galaxies. it is the only galaxy whose formation history can be studied using the full distribution of stars from faint dwarfs to supergiants. the oldest components provide us with unique insight into how galaxies form and evolve over billions of years. th... | the galaxy in context: structural, kinematic, and integrated properties |
the fourth generation of the sloan digital sky survey (sdss-iv) has been in operation since 2014 july. this paper describes the second data release from this phase, and the 14th from sdss overall (making this data release fourteen or dr14). this release makes the data taken by sdss-iv in its first two years of operatio... | the fourteenth data release of the sloan digital sky survey: first spectroscopic data from the extended baryon oscillation spectroscopic survey and from the second phase of the apache point observatory galactic evolution experiment |
the first observational run of the advanced ligo detectors, from september 12, 2015 to january 19, 2016, saw the first detections of gravitational waves from binary black hole mergers. in this paper, we present full results from a search for binary black hole merger signals with total masses up to 100 m⊙ and detailed i... | binary black hole mergers in the first advanced ligo observing run |
aims: solar orbiter, the first mission of esa's cosmic vision 2015-2025 programme and a mission of international collaboration between esa and nasa, will explore the sun and heliosphere from close up and out of the ecliptic plane. it was launched on 10 february 2020 04:03 utc from cape canaveral and aims to address key... | the solar orbiter mission. science overview |
we report the observation of gravitational waves from a binary-black-hole coalescence during the first two weeks of ligo's and virgo's third observing run. the signal was recorded on april 12, 2019 at 05∶30∶44 utc with a network signal-to-noise ratio of 19. the binary is different from observations during the first two... | gw190412: observation of a binary-black-hole coalescence with asymmetric masses |
we present jades jwst/nirspec spectroscopy of gn-z11, the most luminous candidate z > 10 lyman break galaxy in the goods-north field with muv = −21.5. we derive a redshift of z = 10.603 (lower than previous determinations) based on multiple emission lines in our low and medium resolution spectra over 0.7 − 5.3 μm. w... | jades nirspec spectroscopy of gn-z11: lyman-α emission and possible enhanced nitrogen abundance in a z = 10.60 luminous galaxy |
after stars formed in the early universe, their ultraviolet light is expected, eventually, to have penetrated the primordial hydrogen gas and altered the excitation state of its 21-centimetre hyperfine line. this alteration would cause the gas to absorb photons from the cosmic microwave background, producing a spectral... | an absorption profile centred at 78 megahertz in the sky-averaged spectrum |
i describe a method to transform a set of stellar evolution tracks onto a uniform basis and then interpolate within that basis to construct stellar isochrones. this method accommodates a broad range of stellar types, from substellar objects to high-mass stars, and phases of evolution, from the pre-main sequence to the ... | mesa isochrones and stellar tracks (mist) 0: methods for the construction of stellar isochrones |
astrophysical black holes are expected to be described by the kerr metric. this is the only stationary, vacuum, axisymmetric metric, without electromagnetic charge, that satisfies einstein's equations and does not have pathologies outside of the event horizon. we present new constraints on potential deviations from the... | first sagittarius a* event horizon telescope results. vi. testing the black hole metric |
we introduce the disk substructures at high angular resolution project (dsharp), one of the initial large programs conducted with the atacama large millimeter/submillimeter array (alma). the primary goal of dsharp is to find and characterize substructures in the spatial distributions of solid particles for a sample of ... | the disk substructures at high angular resolution project (dsharp). i. motivation, sample, calibration, and overview |
we identify a class of scalar-tensor theories with coupling between the scalar and the gauss-bonnet invariant that exhibit spontaneous scalarization for both black holes and compact stars. in particular, these theories formally admit all of the stationary solutions of general relativity, but these are not dynamically p... | spontaneous scalarization of black holes and compact stars from a gauss-bonnet coupling |
we describe the catalogs assembled and the algorithms used to populate the revised tess input catalog (tic), based on the incorporation of the gaia second data release. we also describe a revised ranking system for prioritizing stars for 2 minute cadence observations, and we assemble a revised candidate target list (ct... | the revised tess input catalog and candidate target list |
the feedback in realistic environments (fire) project explores feedback in cosmological galaxy formation simulations. previous fire simulations used an identical source code (`fire-1') for consistency. motivated by the development of more accurate numerics - including hydrodynamic solvers, gravitational softening, and ... | fire-2 simulations: physics versus numerics in galaxy formation |
the distribution of elements in galaxies provides a wealth of information about their production sites and their subsequent mixing into the interstellar medium. here we investigate the elemental distributions of stars in the illustristng simulations. we analyse the abundance ratios of magnesium and europium in milky wa... | first results from the illustristng simulations: a tale of two elements - chemical evolution of magnesium and europium |
on 17 august 2017, the advanced ligo and virgo detectors observed the gravitational-wave event gw170817—a strong signal from the merger of a binary neutron-star system. less than two seconds after the merger, a γ-ray burst (grb 170817a) was detected within a region of the sky consistent with the ligo-virgo-derived loca... | a gravitational-wave standard siren measurement of the hubble constant |
we present a new and independent determination of the local value of the hubble constant based on a calibration of the tip of the red giant branch (trgb) applied to type ia supernovae (sne ia). we find a value of h 0 = 69.8 ± 0.8 (±1.1% stat) ± 1.7 (±2.4% sys) km s-1 mpc-1. the trgb method is both precise and accurate ... | the carnegie-chicago hubble program. viii. an independent determination of the hubble constant based on the tip of the red giant branch |
the first few 100 myr at z > 10 mark the last major uncharted epoch in the history of the universe, where only a single galaxy (gn-z11 at z ≈ 11) is currently spectroscopically confirmed. here we present a search for luminous z > 10 galaxies with jwst/nircam photometry spanning ≈1-5 μm and covering 49 arcmin2 fro... | two remarkably luminous galaxy candidates at z ≈ 10-12 revealed by jwst |
on 17 august 2017, the laser interferometer gravitational-wave observatory (ligo) and the virgo interferometer detected gravitational waves (gws) emanating from a binary neutron star merger, gw170817. nearly simultaneously, the fermi and integral (international gamma-ray astrophysics laboratory) telescopes detected a g... | swope supernova survey 2017a (sss17a), the optical counterpart to a gravitational wave source |
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