2021AJ....162..282M

Query : 2021AJ....162..282M

2021AJ....162..282M - Astron. J., 162, 282-282 (2021/December-0)

Untangling the Galaxy. III. Photometric search for pre-main-sequence stars with deep learning.

McBRIDE A., LINGG R., KOUNKEL M., COVEY K. and HUTCHINSON B.

Abstract (from CDS):

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.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Pre-main sequence stars - Young stellar objects - Convolutional neural networks - Gould Belt - Solar neighborhood

VizieR on-line data: <Available at CDS (J/AJ/162/282): table4.dat table5.dat>

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 64

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Number of rows : 64
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Heart Nebula HII 02 32.7 +61 27           ~ 336 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
3 * alf Per V* 03 24 19.3700924 +49 51 40.245455 2.64 2.27 1.79     F5Ib 870 1
4 NGC 1333 OpC 03 29 09.2 +31 20 59           ~ 1575 1
5 NAME Perseus Cloud SFR 03 35.0 +31 13           ~ 1553 0
6 Ass Per OB 2 As* 03 42.2 +33 26           ~ 350 0
7 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
8 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
9 NAME CAS-TAU ASS MGr 04 16 +27.6           ~ 86 1
10 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1453 0
11 NAME LkHA 101 Cluster Cl* 04 30 14.0 +35 16 25           ~ 23 0
12 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
13 NAME 25 Ori Group OpC 05 24 50.9 +01 41 38           ~ 195 1
14 Cl Stock 8 OpC 05 27 54.1 +34 28 41           ~ 93 0
15 NAME Orion D Cl* 05 28 -02.0           ~ 22 0
16 IC 417 HII 05 28 03 +34 24.7           ~ 59 0
17 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
18 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
19 NAME Ori Complex Cld 05 35.3 -05 23           ~ 481 0
20 Cl Collinder 69 OpC 05 35 32.1 +09 44 02     2.8     ~ 369 0
21 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
22 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1498 0
23 NAME Rosette Nebula HII 06 32 26.76 +04 47 37.1           ~ 522 1
24 NAME MONOCEROS NEB SNR 06 38 43 +06 30.2           ~ 264 0
25 NGC 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0
26 Ass Vel OB 2 As* 08 09 22.478 -47 21 03.46           ~ 307 0
27 * gam02 Vel WR* 08 09 31.95013 -47 20 11.7108 0.64 1.58 1.83 1.85 2.00 WC8+O7.5III-V 951 0
28 NGC 2547 OpC 08 10 01.5 -49 12 08           ~ 445 0
29 NAME Vela SNR 08 34.0 -45 50           ~ 1331 2
30 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
31 Cl Trumpler 16 OpC 10 45 01.9 -59 42 00           ~ 510 0
32 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 2144 1
33 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 887 0
34 NAME Lower Centaurus Crux As* 12 19 -57.1           ~ 565 1
35 NAME Upper Centaurus Lupus MGr 15 24 -41.9           ~ 567 1
36 NAME Lupus Complex SFR 16 03 -38.1           ~ 851 0
37 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
38 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
39 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
40 Ass Ara OB 1a As* 16 39.5 -46 46           ~ 18 0
41 NAME Sco OB 1 As* 16 53.5 -41 57           ~ 222 0
42 NAME the Pipe Nebula DNe 17 30 -25.0           ~ 442 1
43 NGC 6383 OpC 17 34 41.6 -32 34 27           ~ 168 0
44 IC 4665 OpC 17 46 04.0 +05 36 54           ~ 407 0
45 M 8 OpC 18 03 37 -24 23.2           ~ 644 1
46 NGC 6604 OpC 18 18 03 -12 14.5           ~ 146 0
47 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1195 1
48 LBN 028.77+03.43 HII 18 31 26.5 -02 04 22           ~ 255 2
49 NAME Corona Australis Cloud MoC 19 01 51 -36 58.9           ~ 554 0
50 NGC 6823 OpC 19 43 11.3 +23 18 32   7.71 7.1     ~ 279 2
51 Ass Cyg OB 3 As* 20 07 +35.9           ~ 190 0
52 Ass Cyg OB 1 As* 20 17.8 +37 38           ~ 270 1
53 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0
54 IC 1396 OpC 21 38 51.4 +57 31 52           ~ 523 1
55 IC 5146 OpC 21 53 29.3 +47 14 46           ~ 507 2
56 Ass Cep OB 6 As* 22 30 +58.0           ~ 46 0
57 NAME Ass Cep OB 3b As* 22 55 31.19 +62 38 54.1           ~ 53 0
58 Ass Cep OB 2a As* ~ ~           ~ 8 0
59 NAME Gould Belt PoG ~ ~           ~ 956 1
60 NAME Local Arm reg ~ ~           ~ 649 0
61 NAME Radcliffe Wave PoG ~ ~           ~ 81 0
62 Ass Cep OB 2b As* ~ ~           ~ 6 0
63 NAME Carina Region reg ~ ~           ~ 192 0
64 NAME Local Bubble ISM ~ ~           ~ 1059 0

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