Nearby Young, Active, Late-type Dwarfs in Gaia's First Data Release

Abstract

The Galex Nearby Young Star Survey (GALNYSS) has yielded a sample of $\sim$2000 UV-selected objects that are candidate nearby ($D\stackrel{<}{\sim }$150 pc), young (age $\sim$10--100 Myr), late-type stars. Here, we evaluate the distances and ages of the subsample of (19) GALNYSS stars with Gaia Data Release 1 (DR1) parallax distances $D\le 120$ pc. The overall youth of these 19 mid-K to early-M stars is readily apparent from their positions relative to the loci of main sequence stars and giants in Gaia-based color-magnitude and color-color diagrams constructed for all Galex- and WISE-detected stars with parallax measurements included in DR1. The isochronal ages of all 19 stars lie in the range $\sim$10--100 Myr. Comparison with Li-based age estimates indicates a handful of these stars may be young main-sequence binaries rather than pre-main sequence stars. Nine of the 19 objects have not previously been considered as nearby, young stars, and all but one of these are found at declinations north of $+$30${}^{\circ }$. The Gaia DR1 results presented here indicate that the GALNYSS sample includes several hundred nearby, young stars, a substantial fraction of which have not been previously recognized as having ages $\stackrel{<}{\sim }$100 Myr.

30 pages, 4 tables, 7 figures; to appear in The Astrophysical Journal; 1st replacement to correct typos/omissions in Table 3 and acknowledgments; 2nd replacement to incorporate corrections to ApJ proofs

References in corpus (19)

• The Gaia mission
• New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
• How to Constrain Your M Dwarf: measuring effective temperature, bolometric luminosity, mass, and radius
• Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes
• Trumpeting M Dwarfs with CONCH-SHELL: a Catalog of Nearby Cool Host-Stars for Habitable ExopLanets and Life
• BANYAN. IV. Fundamental parameters of low-mass star candidates in nearby young stellar kinematic groups - Isochronal Age determination using Magnetic evolutionary models
• A New Method to Identify Nearby, Young, Low-mass Stars
• Proper-motion binaries in the Hipparcos Catalogue. Comparison with radial velocity data
• BANYAN. IX. The Initial Mass Function and Planetary-Mass Object Space Density of the TW Hya Association
• The Gaia-ESO Survey: Lithium depletion in the Gamma Velorum cluster and inflated radii in low-mass pre-main-sequence stars
• The rotation - Lithium depletion correlation in the beta Pictoris association and LDB age determination
• A Measurement of Radius Inflation in the Pleiades and its Relation to Rotation and Lithium Depletion
• New low-mass members of the Octans stellar association and an updated 30-40 Myr lithium age
• New Parallaxes and a Convergence Analysis for the TW Hya Association
• The Near-Ultraviolet Luminosity Function of Young, Early M-Type Dwarf Stars
• The Solar Neighborhood. XVIII. Discovery of new proper motion stars with 0.40 arcsec yr^-1 > mu >= 0.18 arcsec yr^-1 between declinations -90 degrees and -47 degrees
• Warm Dusty Debris Disks and Distant Companion Stars: V488 Per and 2M1337
• Chandra Characterization of X-ray Emission in the Young F-Star Binary System HD 113766
• Spectral Classification of Optical Counterparts to ROSAT All-Sky Survey X-ray Sources

Cited by in corpus (7)

• The CARMENES search for exoplanets around M dwarfs: Different roads to radii and masses of the target stars
• A Census of the 32 Ori Association with Gaia
• The Nearby, Young, Chi1 Fornacis Cluster: Membership, Age, and an Extraordinary Ensemble of Dusty Debris Disks
• Lyman-$\alpha$ Observations of High Radial Velocity Low-Mass Stars Ross 1044 and Ross 825
• Searching for new young stars in the northern hemisphere: The Pisces Moving Group
• A kinematically unbiased, all-sky search for nearby, young, low-mass stars
• Walking the Line: Young Stars on the Boundary of the Epsilon Cha and Lower Centaurus-Crux Associations