Untangling the Galaxy. III. Photometric Search for Pre-main-sequence Stars with Deep Learning

  title={Untangling the Galaxy. III. Photometric Search for Pre-main-sequence Stars with Deep Learning},
  author={Aidan McBride and Ryan T. Lingg and Marina A. Kounkel and Kevin R. Covey and Brian Hutchinson},
  journal={The Astronomical Journal},
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 2 Micron All-Sky Survey 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… 
Dynamical Star-forming History of Per OB2
We analyze the internal dynamics of young stars toward Perseus using Gaia EDR3 data, including Per OB2 and California Cloud. Interpreting the current dynamics, we speculate that Per OB2 may have
Turbulence in Milky Way Star-forming Regions Traced by Young Stars and Gas
The interstellar medium (ISM) is turbulent over vast scales and in various phases. In this paper, we study turbulence with different tracers in four nearby star-forming regions: Orion, Ophiuchus,
Low Mass Stars as Tracers of Star and Cluster Formation
We review the use of young low mass stars and protostars, or young stellar objects (YSOs), as tracers of star formation. Observations of molecular clouds at visible, infrared, radio and X-ray


Refining the Census of the Upper Scorpius Association with Gaia
The census of stars and brown dwarfs in the Upper Sco association is refined and it is indicated that Upper Sco is a factor of two younger than the β Pic association according to both non-magnetic and magnetic evolutionary models.
Identification of Young Stellar Object candidates in the Gaia DR2 x AllWISE catalogue with machine learning methods
An all-sky probabilistic catalogue of Young Stellar Objects (YSOs) is made and the 3D structure of the Orion A star-forming complex is explored and the spatial distribution of the YSOs classified by the procedure is in agreement with recent results from the literature.
Accretion Processes in Star Formation: Second Edition
Our understanding of the formation of stars and planetary systems has changed greatly since the first edition of this book was published. This new edition has been thoroughly updated, and now
3D mapping of young stars in the solar neighbourhood with Gaia DR2
We study the three dimensional arrangement of young stars in the solar neighbourhood using the second release of the Gaia mission (Gaia DR2) and we provide a new, original view of the spatial
The inflated radii of M-dwarfs in the Pleiades
Rotation periods obtained with the Kepler satellite have been combined with precise measurements of projected rotation velocity from the WIYN 3.5-m telescope to determine the distribution of
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The APOGEE-2 Survey of the Orion Star-forming Complex. II. Six-dimensional Structure
We present an analysis of spectroscopic and astrometric data from APOGEE-2 and Gaia DR2 to identify structures toward the Orion Complex. By applying a hierarchical clustering algorithm to the
A 3D Dust Map Based on Gaia, Pan-STARRS 1, and 2MASS
A new three-dimensional map of dust reddening, based on Gaia parallaxes and stellar photometry from Pan-STARRS 1 and 2MASS, is presented, which infer the distances, reddenings, and types of 799 million stars.
A New Generation of PARSEC-COLIBRI Stellar Isochrones Including the TP-AGB Phase
We introduce a new generation of PARSEC–COLIBRI stellar isochrones that includes a detailed treatment of the thermally pulsing asymptotic giant branch (TP-AGB) phase, covering a wide range of initial