Search Publications
The Radial Velocity Experiment (RAVE): Fifth Data Release
Steinmetz, Matthias; Chaplin, W. J.; Lund, M. N. +51 more
Data Release 5 (DR5) of the Radial Velocity Experiment (RAVE) is the fifth data release from a magnitude-limited (9< I< 12) survey of stars randomly selected in the Southern Hemisphere. The RAVE medium-resolution spectra (R∼ 7500) covering the Ca-triplet region (8410-8795 Å) span the complete time frame from the start of RAVE observations in…
Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes
Stassun, Keivan G.; Collins, Karen A.; Gaudi, B. Scott
We present empirical measurements of the radii of 116 stars that host transiting planets. These radii are determined using only direct observables—the bolometric flux at Earth, the effective temperature, and the parallax provided by the Gaia first data release—and thus are virtually model independent, with extinction being the only free parameter.…
Target Selection for the SDSS-IV APOGEE-2 Survey
Poleski, R.; Mészáros, Sz.; Covey, K. +34 more
APOGEE-2 is a high-resolution, near-infrared spectroscopic survey observing ∼3 × 105 stars across the entire sky. It is the successor to APOGEE and is part of the Sloan Digital Sky Survey IV (SDSS-IV). APOGEE-2 is expanding on APOGEE's goals of addressing critical questions of stellar astrophysics, stellar populations, and Galactic chem…
Comoving Stars in Gaia DR1: An Abundance of Very Wide Separation Comoving Pairs
Hogg, David W.; Morton, Timothy D.; Price-Whelan, Adrian M. +2 more
The primary sample of the Gaia Data Release 1 is the Tycho-Gaia Astrometric Solution (TGAS): ≈2 million Tycho-2 sources with improved parallaxes and proper motions relative to the initial catalog. This increased astrometric precision presents an opportunity to find new binary stars and moving groups. We search for high-confidence comoving pairs of…
Machine-learned Identification of RR Lyrae Stars from Sparse, Multi-band Data: The PS1 Sample
Grebel, Eva K.; Magnier, Eugene A.; Rix, Hans-Walter +16 more
RR Lyrae stars may be the best practical tracers of Galactic halo (sub-)structure and kinematics. The PanSTARRS1 (PS1) 3π survey offers multi-band, multi-epoch, precise photometry across much of the sky, but a robust identification of RR Lyrae stars in this data set poses a challenge, given PS1's sparse, asynchronous multi-band light curves (≲ 12 …
The California-Kepler Survey. II. Precise Physical Properties of 2025 Kepler Planets and Their Host Stars
Cargile, Phillip A.; Morton, Timothy D.; Fulton, Benjamin J. +11 more
We present stellar and planetary properties for 1305 Kepler Objects of Interest hosting 2025 planet candidates observed as part of the California-Kepler Survey. We combine spectroscopic constraints, presented in Paper I, with stellar interior modeling to estimate stellar masses, radii, and ages. Stellar radii are typically constrained to 11%, comp…
SMASH: Survey of the MAgellanic Stellar History
Bell, Eric F.; Monachesi, Antonela; Choi, Yumi +36 more
The Large and Small Magellanic Clouds are unique local laboratories for studying the formation and evolution of small galaxies in exquisite detail. The Survey of the MAgellanic Stellar History (SMASH) is an NOAO community Dark Energy Camera (DECam) survey of the Clouds mapping 480 deg2 (distributed over ∼2400 square degrees at ∼20% fill…
UCAC5: New Proper Motions Using Gaia DR1
Frouard, J.; Zacharias, N.; Finch, C.
New astrometric reductions of the US Naval Observatory CCD Astrograph Catalog (UCAC) all-sky observations were performed from first principles using the TGAS stars in the 8-11 mag range as the reference star catalog. Significant improvements in the astrometric solutions were obtained, and the UCAC5 catalog of mean positions at a mean epoch near 20…
All-sky Co-moving Recovery Of Nearby Young Members (ACRONYM). II. The β Pictoris Moving Group
Kraus, Adam L.; Shkolnik, Evgenya L.; Liu, Michael C. +2 more
We confirm 66 low-mass stellar and brown dwarf systems (K7-M9) plus 19 visual or spectroscopic companions of the β Pictoris moving group (BPMG). Of these, 41 are new discoveries, increasing the known low-mass members by 45%. We also add four objects to the 14 known with masses predicted to be less than 0.07 {M}⊙ . Our efficient photomet…
LACEwING: A New Moving Group Analysis Code
Blunt, Sarah C.; Faherty, Jacqueline K.; Cruz, Kelle L. +3 more
We present a new nearby young moving group (NYMG) kinematic membership analysis code, LocAting Constituent mEmbers In Nearby Groups (LACEwING), a new Catalog of Suspected Nearby Young Stars, a new list of bona fide members of moving groups, and a kinematic traceback code. LACEwING is a convergence-style algorithm with carefully vetted membership s…