BANYAN. V. A Systematic All-Sky Survey for New Very Late-Type Low-Mass Stars and Brown Dwarfs in Nearby Young Moving Groups

Abstract

We present the BANYAN All-Sky Survey (BASS) catalog, consisting of 228 new late-type (M4-L6) candidate members of nearby young moving groups (YMGs) with an expected false-positive rate of ~ 13%. This sample includes 79 new candidate young brown dwarfs and 22 planetary-mass objects. These candidates were identified through the first systematic all-sky survey for late-type low-mass stars and brown dwarfs in YMGs. We cross-matched the 2MASS and ALLWISE catalogs outside of the galactic plane to build a sample of 98 970 potential $\ge$ M5 dwarfs in the solar neighborhood and calculated their proper motions with typical precisions of 5-15 mas yr${}^{-1}$. We selected highly probable candidate members of several YMGs from this sample using the Bayesian Analysis for Nearby Young AssociatioNs II tool (BANYAN II). We used the most probable statistical distances inferred from BANYAN II to estimate the spectral type and mass of these candidate YMG members. We used this unique sample to show tentative signs of mass segregation in the AB Doradus moving group and the Tucana-Horologium and Columba associations. The BASS sample has already been successful in identifying several new young brown dwarfs in earlier publications, and will be of great interest in studying the initial mass function of YMGs and for the search of exoplanets by direct imaging; the input sample of potential close-by $\ge$ M5 dwarfs will be useful to study the kinematics of low-mass stars and brown dwarfs and search for new proper motion pairs.

37 pages, 27 figures, Accepted for publication in the Astrophysical Journal (Oct 16 2014)

References in corpus (36)

• Constraining the Age-Activity Relation for Cool Stars: The SDSS DR5 Low-Mass Star Spectroscopic Sample
• The Second-Generation Guide Star Catalog: Description and Properties
• On the age of the $\beta$ Pictoris moving group
• Young L Dwarfs Identified in the Field: A Preliminary Low-Gravity, Optical Spectral Sequence from L0 to L5
• The Stellar Population of the Chamaeleon I Star-Forming Region
• Meeting the Cool Neighbors. IX. The Luminosity Function of M7-L8 Ultracool Dwarfs in the Field
• The Radial Velocity Experiment (RAVE): second data release
• Using the minimum spanning tree to trace mass segregation
• A Sample of Very Young Field L Dwarfs and Implications for the Brown Dwarf "Lithium Test" at Early Ages
• Activity and Kinematics of Ultracool Dwarfs Including An Amazing Flare Observation
• A Stellar Census of the Tucana-Horologium Moving Group
• Subtle Signatures of Multiplicity in Late-type Dwarf Spectra: The Unresolved M8.5 + T5 Binary 2MASS J03202839-0446358
• Constraining the thick disc formation scenario of the Milky Way
• New Distant Companions to Known Nearby Stars. II. Faint companions of Hipparcos stars and the frequency of wide binary systems
• A search for binary systems among the nearest L dwarfs
• BANYAN. IV. Fundamental parameters of low-mass star candidates in nearby young stellar kinematic groups - Isochronal Age determination using Magnetic evolutionary models
• Discovery of a wide planetary-mass companion to the young M3 star GU Psc
• Keck Laser Guide Star Adaptive Optics Monitoring of 2MASS J1534-2952AB: First Dynamical Mass Determination of a Binary T Dwarf
• Meeting the Cool Neighbors X: Ultracool dwarfs from the 2MASS All-Sky Data Release
• Prospecting in Ultracool Dwarfs: Measuring the Metallicities of Mid- and Late-M Dwarfs
• A New Method to Identify Nearby, Young, Low-mass Stars
• Discovery of an M9.5 Candidate Brown Dwarf in the TW Hydrae Association - DENIS J124514.1-442907
• Nearby young stars selected by proper motion. I. Four new members of the Beta Pictoris moving group from the Tycho-2 catalog
• New Neighbors: Parallaxes of 18 nearby stars selected from the LSPM-north catalog
• An accurate distance to 2M1207Ab
• New, nearby bright southern ultracool dwarfs
• SSPMJ1102-3431 brown dwarf characterization from accurate proper motion and trigonometric parallax
• Southern wide very low-mass stars and brown dwarfs in resolved binary and multiple systems
• Trigonometric parallaxes of young field L dwarfs
• The LuckyCam Survey for Very Low Mass Binaries II: 13 new M4.5-M6.0 Binaries
• SIMP J2154-1055: A New Low-Gravity L4$\beta$ Brown Dwarf Candidate Member of the Argus Association
• The Coolest Isolated Brown Dwarf Candidate Member of TWA
• A New Brown Dwarf Desert? A Scarcity of Wide Ultracool Binaries
• Optical spectroscopy of high proper motion stars: new M dwarfs within 10 pc and the closest pair of subdwarfs
• The nearby young visual binary HIP 115147 and its common proper motion companion LSPM J2322+7847
• SIMP: A Near-Infrared Proper Motion Survey

Cited by in corpus (49)

• The Hawaii Infrared Parallax Program. II. Young Ultracool Field Dwarfs
• CARMENES input catalogue of M dwarfs V. Luminosities, colours, and spectral energy distributions
• On the Age of the TRAPPIST-1 System
• LACEwING: A New Moving Group Analysis Code
• A Search for L/T Transition Dwarfs With Pan-STARRS1 and WISE. II. L/T Transition Atmospheres and Young Discoveries
• Let the Great World Spin: Revealing the Stormy, Turbulent Nature of Young Giant Exoplanet Analogs with the Spitzer Space Telescope
• BANYAN. IX. The Initial Mass Function and Planetary-Mass Object Space Density of the TW Hya Association
• In-depth study of moderately young but extremely red, very dusty substellar companion HD206893B
• A 3D view of the Hyades stellar and sub-stellar population
• Variability of the Lowest Mass Objects in the AB Doradus Moving Group
• ACRONYM III: Radial Velocities for 336 Candidate Young Low-Mass Stars in the Solar Neighborhood, Including 78 Newly Confirmed Young Moving Group Members
• Cloudless atmospheres for young low-gravity substellar objects
• MASSIVE: A Bayesian analysis of giant planet populations around low-mass stars
• The Gaia Ultra-Cool Dwarf Sample -- II: Structure at the end of the main sequence
• Planets Around Low-Mass Stars (PALMS). VI. Discovery of a Remarkably Red Planetary-Mass Companion to the AB Dor Moving Group Candidate 2MASS J22362452+4751425
• As the Worlds Turn: Constraining Spin Evolution in the Planetary-Mass Regime
• Strong H$\alpha$ emission and signs of accretion in a circumbinary planetary mass companion from MUSE
• The GAPS Programme with HARPS-N at TNG. XXXVII. A precise density measurement of the young ultra-short period planet TOI-1807 b
• A Brown Dwarf Census from the SIMP Survey
• Lithium depletion boundary, stellar associations, and Gaia
• Near-infrared Accretion Signatures from the Circumbinary Planetary Mass Companion Delorme 1 (AB)b
• Binaries among low-mass stars in nearby young moving groups
• BANYAN. VIII. New Low-Mass Stars and Brown Dwarfs with Candidate Circumstellar Disks
• Activity of TRAPPIST-1 analogue stars observed with TESS
• ${\mathcal{Q}}^{+}$: Characterising the structure of young star clusters
• PSYM-WIDE: a survey for large-separation planetary-mass companions to late spectral type members of young moving groups
• The Late-Type Extension to MoVeRS (LaTE-MoVeRS): Proper motion verified low-mass stars and brown dwarfs from SDSS, 2MASS, and WISE
• The Oceanus Moving Group: A New 500 Myr-Old Host for the Nearest Brown Dwarf
• New binaries from the SHINE survey
• A Census of the 32 Ori Association with Gaia
• Exploring the planetary-mass population in the Upper Scorpius association
• Direct imaging of exoplanets: Legacy and prospects
• On the Correlation between L Dwarf Optical and Infrared Variability and Radio Aurorae
• Multiplicity of stars with planets in the solar neighbourhood
• Detection of lithium in nearby young late-M dwarfs
• The binary system of the spinning-top Be star Achernar
• Low-mass members of nearby young stellar moving groups from Gaia EDR3
• The Puzzling Story of Flare Inactive Ultra Fast Rotating M dwarfs. I. Exploring their Magnetic Fields
• Strong H$\alpha$ emission in the young planetary mass companion 2MASS J0249-0557 c
• Radial Velocities, Space Motions, and Nearby Young Moving Group Memberships of Eleven Candidate Young Brown Dwarfs
• Reaching the boundary between stellar kinematic groups and very wide binaries. IV. The widest Washington double star systems with rho > 1000 arcsec in Gaia DR3
• Spectral characterization of young LT dwarfs
• Distinct Rotational Evolution of Giant Planets and Brown Dwarf Companions
• Characterising Young Visual M-dwarf Binaries with Near-Infrared Integral Field Spectra
• ACRONYM IV: Three New, Young, Low-mass Spectroscopic Binaries
• The Gaia Ultracool Dwarf Sample -- IV. GTC/OSIRIS optical spectra of Gaia late-M and L dwarfs
• A simple linear model to aid in analyses of the Beta Pictoris moving group
• Pushing the Limit of Asteroseismic Detection for Cool Dwarfs using TESS and Deep Learning
• Disentangling the Signatures of Blended-Light Atmospheres in L/T Transition Brown Dwarfs