A Gaia Survey for Young Stars Associated with the Lupus Clouds

Abstract

I have used high-precision photometry and astrometry from the second data release of the Gaia mission to perform a survey for young stars associated with the Lupus clouds, which have distances of ~160 pc and reside within the Sco-Cen OB association. The Gaia data have made it possible to distinguish Lupus members from most of the stars in other groups in Sco-Cen that overlap with the Lupus clouds, which have contaminated previous surveys. The new catalog of candidate Lupus members should be complete for spectral types earlier than M7 at A_K<0.2 within fields encompassing clouds 1--4. I have used that catalog to characterize various aspects of the Lupus stellar population. For instance, the sequence of low-mass stars in Lupus is ~0.4 mag brighter than the sequence for Upper Sco, which implies an age of ~6 Myr based an adopted age of 10-12 Myr for Upper Sco and the change in luminosity with age predicted by evolutionary models. I also find that the initial mass function in Lupus is similar to that in other nearby star-forming regions based on a comparison of their distributions of spectral types.

arXiv commentAstronomical Journal, in press; machine readable tables available at http://personal.psu.edu/kll207/lupus.tar

References in corpus (75)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• The Gaia mission
• The Infrared Array Camera (IRAC) for the Spitzer Space Telescope
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• The Spitzer Space Telescope Mission
• MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
• Estimating distances from parallaxes IV: Distances to 1.33 billion stars in Gaia Data Release 2
• New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
• A Hipparcos census of the nearby OB associations
• GAIA: Composition, Formation and Evolution of the Galaxy
• The Wavelength Dependence of Interstellar Extinction from 1.25 to 8.0 microns Using GLIMPSE Data
• A Revised Age for Upper Scorpius and The Star-Formation History Among the F-Type Members of the Scorpius-Centaurus OB Association
• From Molecular Cores to Planet-forming Disks: A SIRTF Legacy Program
• Spitzer Space Telescope study of disks in the young $\sigma$ Orionis cluster
• A self-consistent, absolute isochronal age scale for young moving groups in the solar neighbourhood
• X-Shooter spectroscopy of young stellar objects in Lupus: Accretion properties of class II and transitional objects
• An Optical Spectroscopic Study of T Tauri Stars. I. Photospheric Properties
• The Disk Population of the Taurus Star-Forming Region
• The Star-formation History and Accretion-Disk Fraction Among the K-Type Members of the Scorpius-Centaurus OB Association
• X-Shooter spectroscopy of young stellar objects: IV -- Accretion in low-mass stars and sub-stellar objects in Lupus
• Pulkovo Compilation of Radial Velocities for 35495 Hipparcos Stars in a Common System
• Search for Associations Containing Young stars (SACY): I. Sample & Searching Method
• Magnetic Inhibition of Convection and the Fundamental Properties of Low-Mass Stars. III. A Consistent 10 Myr Age for the Upper Scorpius OB Association
• Post-T Tauri Stars in the Nearest OB Association
• Science performance of Gaia, ESA's space-astrometry mission
• The Optical-Infrared Extinction Curve and its Variation in the Milky Way
• Evidence for a co-moving sub-stellar companion of GQ Lup
• The Disk Population of the Upper Scorpius Association
• A Compendium of Distances to Molecular Clouds in the Star Formation Handbook
• The Spitzer c2d Survey of Weak-line T Tauri Stars II: New Constraints on the Timescale for Planet Building
• A Likely Close-In Low-Mass Stellar Companion to the Transitional Disk Star HD 142527
• X-Shooter spectroscopy of young stellar objects: II. Impact of chromospheric emission on accretion rate estimates
• On the gas content of transitional disks: a VLT/X-Shooter study of accretion and winds
• The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds. XI. Lupus Observed With IRAC and MIPS
• Hipparcos distances of Ophiuchus and Lupus cloud complexes
• A Spitzer c2d Legacy Survey to Identify and Characterize Disks with Inner Dust Holes
• Discovery of H-alpha Emission from the Close Companion Inside the Gap of Transitional Disk HD142527
• Prospects for Detection of Catastrophic Collisions in Debris Disks
• The Stellar Membership of the Taurus Star-forming Region
• On the Transitional Disk Class: Linking Observations of T Tauri Stars & Physical Disk Models
• A Census of Young Stars and Brown Dwarfs in IC 348 and NGC 1333
• Young, Low-Mass Brown Dwarfs with Mid-Infrared Excesses
• Refining the Census of the Upper Scorpius Association with Gaia
• The Spitzer c2d Survey of Weak-Line T Tauri Stars. III. The Transition from Primordial Disks to Debris Disks
• X-Shooter spectroscopy of young stellar objects in Lupus. Atmospheric parameters, membership and activity diagnostics
• Distances and Kinematics of Gould Belt Star-Forming Regions with Gaia DR2 results
• The stellar population of Sco OB2 revealed by Gaia DR2 data
• A Survey for New Members of Taurus from Stellar to Planetary Masses
• A WISE Survey of Circumstellar Disks in Taurus
• The Nature of Transition Circumstellar Disks II. Southern Molecular Clouds
• New Young Stars and Brown Dwarfs in the Upper Scorpius Association
• Constraints to the Masses of Brown Dwarf Candidates from the Lithium Test
• A large moving group within the Lower Centaurus Crux association
• A WISE Survey of Circumstellar disks in the Upper Scorpius Association
• A catalogue of dense cores and young stellar objects in the Lupus complex based on Herschel Gould Belt Survey observations
• Substellar Objects in Nearby Young Clusters (SONYC) IX: The planetary-mass domain of Chamaeleon-I and updated mass function in Lupus-3
• A kinematic study and membership analysis of the Lupus star-forming region
• Spectroscopic properties of Young Stellar Objects in the Lupus Molecular Clouds
• A Survey For Planetary-mass Brown Dwarfs in the Taurus and Perseus Star-forming Regions
• A census of $\rho$ Oph candidate members from Gaia DR2
• A Survey for New Stars and Brown Dwarfs in the Ophiuchus Star-forming Complex
• New Low-Mass Stars and Brown Dwarfs with Disks in Lupus
• Substellar Objects in Nearby Young Clusters (SONYC) VIII: Substellar population in Lupus 3
• Identification of new transitional disk candidates in Lupus with Herschel
• The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds. IV. Lupus Observed with MIPS
• Allsky NICER and NICEST extinction maps based on the 2MASS near-infrared survey
• Very low-mass members of the Lupus 3 cloud
• A new compact young moving group around V1062 Sco
• Gaia DR2 view of the Lupus V-VI clouds: the candidate diskless young stellar objects are mainly background contaminants
• The Spitzer Survey of Interstellar Clouds in the Gould Belt. IV. Lupus V and VI Observed with IRAC and MIPS
• Very Low-Mass Stars and Brown Dwarfs in Upper Scorpius using Gaia DR1: Mass Function, Disks and Kinematics
• 2MASS J15491331-3539118: a new low-mass wide companion of the GQ Lup system
• New member candidates of Upper Scorpius from Gaia DR1
• A Random Forest Approach to Identifying Young Stellar Object Candidates in the Lupus Star-Forming Region

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• Numerical studies on the link between radioisotopic signatures on Earth and the formation of the Local Bubble. II. Advanced modeling of interstellar 26Al, 53Mn, 60Fe, and 244Pu influxes as traces of past supernovae in the solar neighborhood
• Spatially correlated stellar accretion in the Lupus star forming region: Evidence for ongoing infall from the interstellar medium
• The He I $\lambda$10830 $\mathring{A}$ line as a probe of winds and accretion in young stars in Lupus and Upper Scorpius
• Distances to nearby molecular clouds traced by young stars
• A Novel Method to Estimate the FUV Flux and a Catalogue for Star-Hosting Discs in Nearby Star-Forming Regions
• Stellar Properties for a Comprehensive Collection of Star Forming Regions in the SDSS APOGEE-2 Survey
• Testing protoplanetary disc evolution with CO fluxes. A proof of concept in Lupus and Upper Sco
• Atacama Large Aperture Submillimeter Telescope (AtLAST) Science: Our Galaxy
• Millimeter emission in photoevaporating disks is determined by early substructures
• The evolution of protoplanetary disc radii and disc masses in star-forming regions
• Spectroscopy of Candidate Members of the Sco-Cen Complex
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• Planet-forming disks and their environment across regions and time from the full NIR census
• The survivorship bias of protoplanetary disc populations
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• Measuring Dust Masses of Protoplanetary Disks in Serpens and L1641/L1647 with ALMA
• The Radiowave Hunt for Young Stellar Object Emission and Demographics (RADIOHEAD): A Radio Luminosity$-$Spectral Type Dependence in Taurus$-$Auriga YSOs
• Compact CO emission and no evidence of radial drift. ALMA observations of the faintest planet-forming disks in Lupus