Search Publications
Missions
Journals
Publication Years
Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18
Khan, S.; Jordi, C.; Anders, F. +19 more
Combining the precise parallaxes and optical photometry delivered by Gaia's second data release with the photometric catalogues of Pan-STARRS1, 2MASS, and AllWISE, we derived Bayesian stellar parameters, distances, and extinctions for 265 million of the 285 million objects brighter than G = 18. Because of the wide wavelength range used, our result…
Proper motions and dynamics of the Milky Way globular cluster system from Gaia DR2
Vasiliev, Eugene
We use Gaia Data Release 2 to determine the mean proper motions for 150 Milky Way globular clusters (almost the entire known population), with a typical uncertainty of 0.05 mas yr-1 limited mainly by systematic errors. Combining them with distance and line-of-sight velocity measurements from the literature, we analyse the distribution o…
The ASAS-SN catalogue of variable stars - II. Uniform classification of 412 000 known variables
Kochanek, C. S.; Stanek, K. Z.; Dong, Subo +12 more
The variable stars in the VSX catalogue are derived from a multitude of inhomogeneous data sources and classification tools. This inhomogeneity complicates our understanding of variable star types, statistics, and properties, and it directly affects attempts to build training sets for current (and next) generation all-sky, time-domain surveys. We …
Footprints of the Sagittarius dwarf galaxy in the Gaia data set
Laporte, Chervin F. P.; Gómez, Facundo A.; Minchev, Ivan +1 more
We analyse an N-body simulation of the interaction of the Milky Way (MW) with a Sagittarius-like dSph (Sgr), looking for signatures which may be attributed to its orbital history in the phase space volume around the Sun in light of Gaia DR2 discoveries. The repeated impacts of Sgr excite coupled vertical and radial oscillations in the disc which q…
What is a globular cluster? An observational perspective
D'Orazi, Valentina; Gratton, Raffaele; Bragaglia, Angela +3 more
Globular clusters are large and dense agglomerate of stars. At variance with smaller clusters of stars, they exhibit signs of some chemical evolution. At least for this reason, they are intermediate between open clusters and massive objects such as nuclear clusters or compact galaxies. While some facts are well established, the increasing amount o…
Big Three Dragons: A z = 7.15 Lyman-break galaxy detected in [O III] 88 µm, [C II] 158 µm, and dust continuum with ALMA
Ono, Yoshiaki; Ouchi, Masami; Harikane, Yuichi +18 more
We present new ALMA observations and physical properties of a Lyman break galaxy at z = 7.15. Our target, B14-65666, has a bright ultra-violet (UV) absolute magnitude, MUV ≈ -22.4, and has been spectroscopically identified in Lyα with a small rest-frame equivalent width of ≈4 Å. A previous Hubble Space TElescope (HST) image has shown th…
A z = 0 Multiwavelength Galaxy Synthesis. I. A WISE and GALEX Atlas of Local Galaxies
Sandstrom, Karin M.; Leroy, Adam K.; Salim, Samir +8 more
We present an atlas of ultraviolet and infrared images of ∼15,750 local (d ≲ 50 Mpc) galaxies, as observed by NASA’s Wide-field Infrared Survey Explorer (WISE) and Galaxy Evolution Explorer (GALEX) missions. These maps have matched resolution (FWHM 7.″5 and 15″), matched astrometry, and a common procedure for background removal. We demonstrate tha…
A Large Catalog of Accurate Distances to Local Molecular Clouds: The Gaia DR2 Edition
Alves, João; Speagle, Joshua S.; Zucker, Catherine +4 more
We present a uniform catalog of accurate distances to local molecular clouds informed by the Gaia DR2 data release. Our methodology builds on that of Schlafly et al. First, we infer the distance and extinction to stars along sightlines toward the clouds using optical and near-infrared photometry. When available, we incorporate knowledge of the ste…
SkyMapper Southern Survey: Second data release (DR2)
Wolf, Christian; Schmidt, Brian P.; Onken, Christopher A. +6 more
We present the second data release (DR2) of the SkyMapper Southern Survey, a hemispheric survey carried out with the SkyMapper Telescope at Siding Spring Observatory in Australia, using six optical filters: u, v, g, r, i, z. DR2 is the first release to go beyond the ∼18 mag (10σ) limit of the Shallow Survey released in the first data release (DR1)…
Probing Galactic haloes with fast radio bursts
Prochaska, J. Xavier; Zheng, Yong
The precise localization (<1 arcsec) of multiple fast radio bursts (FRBs) to z > 0.1 galaxies has confirmed that the dispersion measures (DMs) of these enigmatic sources afford a new opportunity to probe the diffuse ionized gas around and in between galaxies. In this manuscript, we examine the signatures of gas in dark matter haloes (aka hal…