J/AJ/162/282 Untangling Galaxy. III. Pre-main-sequence stars (Mcbride+, 2021)
Untangling the Galaxy.
III. Photometric search for pre-main-sequence stars with deep learning.
Mcbride A., Lingg R., Kounkel M., Covey K., Hutchinson B.
<Astron. J., 162, 282-282 (2021)>
=2021AJ....162..282M 2021AJ....162..282M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, pre-main sequence; YSOs; Extinction; Optical
Keywords: Pre-main sequence stars; Young stellar objects
Convolutional neural networks; Gould Belt; Solar neighborhood
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 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 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
Gould's Belt.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 77 197315 Output catalog based on DR2
table5.dat 77 448824 Output catalog cased on EDR3
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
II/360 : Gaia DR2 x AllWISE catalogue (Marton+, 2019)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
J/ApJ/748/14 : ONC population data from WFI observations (Da Rio+, 2012)
J/A+A/556/A144 : Proper motions young stars in Chamaeleon (Lopez Marti+, 2013)
J/ApJS/207/5 : YSOs in LDN 1641 with Hectochelle spectra (Fang+, 2013)
J/A+A/567/A109 : Carina nebula optically identified YSOs (Kumar+, 2014)
J/ApJ/786/97 : Photospheric properties of T Tauri stars (Herczeg+, 2014)
J/ApJ/787/108 : Age estimates massive SFR stellar populations (Getman+, 2014)
J/A+A/584/A26 : Cosmography of OB stars in solar neighbourhood (Bouy+, 2015)
J/A+A/563/A94 : Kinematics of the Gamma Vel cluster (Jeffries+, 2014)
J/AJ/149/103 : Spectroscopy of candidate YSOs in Serpens (Erickson+, 2015)
J/AJ/150/95 : Masses and ages of YSOs in Per OB2 (Azimlu+, 2015)
J/MNRAS/458/3479 : SVM selection of WISE YSO Candidates (Marton+, 2016)
J/AJ/153/188 : Spectroscopy of foreground population in Orion A (Fang+, 2017)
J/ApJ/838/150 : The Taurus-Auriga ecosystem. I. (Kraus+, 2017)
J/AJ/156/84 : APOGEE-2 survey of Orion Complex. II. (Kounkel+, 2018)
J/AJ/156/271 : The stellar membership of the Taurus SFR (Luhman, 2018)
J/A+A/621/A115 : Vela OB2 members (Cantat-Gaudin+, 2019)
J/A+A/623/A112 : The Sco OB2 population from Gaia DR2 data (Damiani+, 2019)
J/A+A/630/A137 : Structure and kinematics of the Taurus region (Galli+, 2019)
J/A+A/631/A32 : 3D dust extinction map 600pc cude Sun centered (Leike+, 2019)
J/A+A/631/A166 : Members of 5 cluster in Ori OB1a association (Kos+, 2019)
J/AJ/157/85 : The CIDA Variability Survey of Orion OB1. II. (Briceno+, 2019)
J/AJ/158/122 : Local structure & star formation history MW (Kounkel+, 2019)
J/ApJ/878/111 : Members Serpens Molecular Cloud with Gaia DR2 (Herczeg+, 2019)
J/ApJ/884/6 : Known members of Orion A with Gaia DR2 data (McBride+, 2019)
J/A+A/640/A1 : Portrait Galactic disc (Cantat-Gaudin+, 2020)
J/AJ/160/44 : Upper Scorpius spectroscopy and photometry (Luhman+, 2020)
J/AJ/160/279 : Untangling Galaxy. II. Structure within 3kpc (Kounkel+, 2020)
J/ApJ/900/14 : ∼17000 runaways star from Orion Nebula Cluster (Farias+, 2020)
J/A+A/645/A84 : Coronae of nearby star clusters (Meingast+, 2021)
J/ApJS/254/33 : Gal. midplane Spitzer/IRAC candidate YSOs (Kuhn+, 2021)
Byte-by-byte Description of file: table[45].dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- Gaia Gaia identifier
21- 30 F10.6 deg RAdeg Right ascension (J2000)
32- 41 F10.6 deg DEdeg Declination (J2000)
43- 47 F5.3 [yr] Age Age, log
49- 53 F5.3 [yr] e_Age Error on Age
55- 59 F5.3 --- PMS Pre-main sequence probability
61- 65 F5.3 --- e_PMS Error on PMS
67- 71 F5.3 mag AV Predicted extinction (1)
73- 77 F5.3 mag e_AV Error on AV
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Note (1): Spatially averaged AV estimated at a given RAdeg, DEdeg, and age,
not to be confused with the true AV of a star, which can be
significantly higher, particularly in the young stars still associated
with dusty envelopes and/or disks.
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History:
From electronic version of the journal
References:
Kounkel et al. Paper I : 2019AJ....158..122K 2019AJ....158..122K Cat. J/AJ/158/122
Kounkel et al. Paper II : 2020AJ....160..279K 2020AJ....160..279K Cat. J/AJ/160/279
(End) Prepared by [AAS], Coralie Fix [CDS], 06-Apr-2022