Untangling the Galaxy III: Photometric Search for Pre-main Sequence Stars with Deep Learning

Abstract

A reliable census of pre-main sequence stars with known ages is critical to our understanding of early stellar evolution, but historically there has been difficulty in separating such stars from the field. We present a trained neural network model, Sagitta, that relies on Gaia DR2 and 2MASS photometry to identify pre-main sequence stars and to derive their age estimates. Our model successfully recovers populations and stellar properties associated with known star forming regions up to five kpc. Furthermore, it allows for a detailed look at the star-forming history of the solar neighborhood, particularly at age ranges to which we were not previously sensitive. In particular, we observe several bubbles in the distribution of stars, the most notable of which is a ring of stars associated with the Local Bubble, which may have common origins with the Gould's Belt.

arXiv commentModel available at https://github.com/hutchresearch/Sagitta

References in corpus (77)

• Gaia Data Release 2. Summary of the contents and survey properties
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• Gaia Data Release 2: The astrometric solution
• The Spitzer c2d Legacy Results: Star Formation Rates and Efficiencies; Evolution and Lifetimes
• New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
• A 3D Dust Map Based on Gaia, Pan-STARRS 1 and 2MASS
• A new generation of PARSEC-COLIBRI stellar isochrones including the TP-AGB phase
• Very Low Mass Stars and Brown Dwarfs in Taurus-Auriga
• Painting a portrait of the Galactic disc with its stellar clusters
• Gaia Data Release 2: first stellar parameters from Apsis
• The Spitzer Space Telescope Survey of the Orion A & B Molecular Clouds - Part I: A Census of Dusty Young Stellar Objects and a Study of their Mid-IR Variability
• An Optical Spectroscopic Study of T Tauri Stars. I. Photospheric Properties
• The Star-formation History and Accretion-Disk Fraction Among the K-Type Members of the Scorpius-Centaurus OB Association
• The H$\alpha$ emission of nearby M dwarfs and its relation to stellar rotation
• The APOGEE-2 Survey of the Orion Star Forming Complex II: Six-dimensional structure
• The stellar association around Gamma Velorum and its relationship with Vela OB2
• The Formation and Destruction of Molecular Clouds and Galactic Star Formation
• Effect of episodic accretion on the structure and the lithium depletion of low-mass stars and planet-hosting stars
• A Compendium of Distances to Molecular Clouds in the Star Formation Handbook
• Untangling the Galaxy I: Local Structure and Star Formation History of the Milky Way
• 3D maps of interstellar dust in the Local Arm: using $Gaia$, 2MASS and APOGEE-DR14
• Optical Spectroscopy of the Surface Population of the rho Ophiuchi Molecular Cloud: The First Wave of Star Formation
• A Galactic-scale gas wave in the Solar Neighborhood
• The Initial Mass Function of the Orion Nebula Cluster across the H-burning limit
• Structure and kinematics of the Taurus star-forming region from Gaia-DR2 and VLBI astrometry
• An all-sky Support Vector Machine selection of WISE YSO Candidates
• 3D mapping of young stars in the solar neighbourhood with Gaia DR2
• The Stellar Membership of the Taurus Star-forming Region
• The Gaia-ESO Survey: Kinematic structure in the Gamma Velorum Cluster
• Empirical Isochrones for Low Mass Stars in Nearby Young Associations
• Young Stellar Objects in Lynds 1641: Disks, Accretion, and Star Formation History
• Extended stellar systems in the solar neighborhood -- V. Discovery of coronae of nearby star clusters
• Refining the Census of the Upper Scorpius Association with Gaia
• Stars with Photometrically Young Gaia Luminosities Around the Solar System (SPYGLASS) I: Mapping Young Stellar Structures and their Star Formation Histories
• Star Formation in Space and Time: Taurus-Auriga
• SPICY: The Spitzer/IRAC Candidate YSO Catalog for the Inner Galactic Midplane
• Untangling the Galaxy. II. Structure within 3 kpc
• Age Gradients in the Stellar Populations of Massive Star Forming Regions Based on a New Stellar Chronometer
• The Herschel Orion Protostar Survey: Luminosity and Envelope Evolution
• The Greater Taurus-Auriga Ecosystem I: There Is A Distributed Older Population
• The stellar population of Sco OB2 revealed by Gaia DR2 data
• Structure, kinematics, and ages of the young stellar populations in the Orion region
• Identification of Young Stellar Object candidates in the $Gaia$ DR2 x AllWISE catalogue with machine learning methods
• The Age, Stellar Content and Star Formation Timescale of the B59 Dense Core
• Cygnus OB2 DANCe: A high precision proper motion study of the Cygnus OB2 association
• Catalogue of new Herbig Ae/Be and classical Be stars. A machine learning approach to Gaia DR2
• The inflated radii of M-dwarfs in the Pleiades
• 3D dynamics of the Orion cloud complex -- Discovery of coherent radial gas motions at the 100-pc scale
• Runaway and walkaway stars from the ONC with Gaia DR2
• Charting nearby dust clouds using Gaia data only
• A ring in a shell: the large-scale 6D structure of the Vela OB2 complex
• An initial overview of the extent and structure of recent star formation within the Serpens Molecular Cloud using Gaia Data Release 2
• NGC 1980 is not a foreground population of Orion: Spectroscopic survey of young stars with low extinction in Orion A
• APOGEE Net: Improving the derived spectral parameters for young stars through deep learning
• Uncovering a 260 pc wide, 35 Myr old filamentary relic of star formation
• Pre-main sequence stars in the Cepheus flare region
• The AKARI FIS YSO Catalogue
• Runaway Young Stars in the Orion Nebula
• Dynamical stellar masses of pre-main sequence stars in Lupus and Taurus obtained with ALMA surveys in comparison with stellar evolutionary models
• Discovery of a 21 Myr old stellar population in the Orion complex
• Internal and relative motions of the Taurus and Ophiuchus star-forming regions
• Supernovae in the Orion: the missing link in the star forming history of the region
• Hunting for Runaways from the Orion Nebula Cluster
• Young cluster Berkeley 59 : Properties, evolution and star formation
• Dark impact and galactic star formation: Origin of the Gould belt
• A three-dimensional map of the hot Local Bubble using diffuse interstellar bands
• A WISE Census of Young Stellar Objects in Perseus OB2 Association
• New Low-Mass Stars in the 25 Orionis Stellar Group and Orion OB1a Sub-association from SDSS-III/BOSS Spectroscopy
• Physical parameters of pre-main sequence stars in open clusters
• Investigation of the stellar content in the western part of the Carina nebula
• The Nearest OB Association: Scorpius-Centaurus (Sco OB2)
• Low mass star formation and subclustering in the HII regions RCW 32, 33 and 27 of the Vela Molecular Ridge. A photometric diagnostics to identify M-type stars
• Proper motions of young stars in Chamaeleon. II. New kinematical candidate members of Chamaeleon I and II
• The Young Cluster and Star Forming Region NGC 2264
• Hubble Tarantula Treasury Project - VI. Identification of Pre-Main-Sequence Stars using Machine Learning techniques
• Searching for Young Stellar Objects through SEDs by Machine Learning
• PTFO 8-8695: Two Stars, Two Signals, No Planet

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• The Eighteenth Data Release of the Sloan Digital Sky Surveys: Targeting and First Spectra from SDSS-V
• Untangling the Galaxy. IV. Empirical Constraints on Angular Momentum Evolution and Gyrochronology for Young Stars in the Field
• Turbulence in Milky Way Star-Forming Regions Traced by Young Stars and Gas
• Low Mass Stars as Tracers of Star and Cluster Formation
• A gravitational and dynamical framework of star formation: The Orion Nebula
• A Population of Dipper Stars from the Transiting Exoplanet Survey Satellite Mission
• A Naive Bayes Classifier for identifying Class II YSOs
• Distances to nearby molecular clouds traced by young stars
• Dynamical star forming history of Per OB2
• Rubin Observatory LSST Stars Milky Way and Local Volume Star Clusters Roadmap
• Measurement of the angular momenta of pre-main-sequence stars: early evolution of slow and fast rotators and empirical constraints on spin-down torque mechanisms
• ABYSS I: Targeting strategy for APOGEE & BOSS young star survey in SDSS-V
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• A Low-Mass Pre-Main-Sequence Eclipsing Binary in Lower Centaurus Crux Discovered with TESS
• Spectroscopic Confirmation of a Population of Isolated, Intermediate-Mass YSOs
• Dynamical masses across the Hertzsprung-Russell diagram
• The Effect of Molecular Cloud Properties on the Kinematics of Stars Formed in the Trifid Region
• Migration and Evolution of giant ExoPlanets (MEEP) II: Super-Jupiters and Lithium-rich Host Stars
• LAMOST YSOs. I. Spectroscopically identifying and characterizing M-type young stellar objects
• Dense Molecular Ring-like structure in gaseous CO depletion region G34.74-0.12