2021ApJ...917...23K

Query : 2021ApJ...917...23K

2021ApJ...917...23K - Astrophys. J., 917, 23-23 (2021/August-2)

Stars with photometrically young Gaia luminosities around the solar system (SPYGLASS). I. Mapping Young stellar structures and their star formation histories.

KERR R.M.P., RIZZUTO A.C., KRAUS A.L. and OFFNER S.S.R.

Abstract (from CDS):

Young stellar associations hold a star formation record that can persist for millions of years, revealing the progression of star formation long after the dispersal of the natal cloud. To identify nearby young stellar populations that trace this progression, we have designed a comprehensive framework for the identification of young stars and use it to identify ∼3 x 104 candidate young stars within a distance of 333 pc using Gaia DR2. Applying the HDBSCAN clustering algorithm to this sample, we identify 27 top-level groups, nearly half of which have little to no presence in previous literature. Ten of these groups have visible substructure, including notable young associations such as Orion, Perseus, Taurus, and Sco-Cen. We provide a complete subclustering analysis of all groups with substructure, using age estimates to reveal each region's star formation history. The patterns we reveal include an apparent star formation origin for Sco-Cen along a semicircular arc, as well as clear evidence for sequential star formation moving away from that arc with a propagation speed of ∼4 km s–1 (∼4 pc Myr–1). We also identify earlier bursts of star formation in Perseus and Taurus that predate current, kinematically identical active star-forming events, suggesting that the mechanisms that collect gas can spark multiple generations of star formation, punctuated by gas dispersal and cloud regrowth. The large spatial scales and long temporal scales on which we observe star formation offer a bridge between the processes within individual molecular clouds and the broad forces guiding star formation at galactic scales.

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

Journal keyword(s): Stellar associations - Stellar ages - Star formation - Young star clusters - Young stellar objects - Pre-main sequence stars - OB associations

VizieR on-line data: <Available at CDS (J/ApJ/917/23): table1.dat table2.dat>

Nomenclature: Fig. 10, Table 3 col(2): [KRK2021] Taurus-Orion R (Nos Taurus-Orion I to Taurus-Orion IV), [KRK2021] Ophiuchus Southeast N=1, [KRK2021] Fornax-Horologium N=1, [KRK2021] CMa North N=1, [KRK2021] Aquila East N=1, [KRK2021] Cepheus Far North N=1, [KRK2021] Cepheus-Cygnus N=1, [KRK2021] Lyra N=1, [KRK2021] Cerberus N=1, [KRK2021] Carina-Musca N=1, [KRK2021] Greater Taurus N=1, [KRK2021] Monoceros Southwest N=1, [KRK2021] Greater Orion. Fig. 10, Table 3 col(1): [KRK2021] TLC NN (Nos 1-27). Fig. 13, Table 4: [KRK2021] GT-NN (Nos 1-11), [KRK2021] GT-NA (Nos 3A-3B, 4A-4B, 8A-8B, 9A-9B). Fig. 15, Table 5: [KRK2021] ORI-N (Nos 1-3), [KRK2021] ORI-NA (Nos 1A-1C). Fig. 18, Table 6: [KRK2021] SC-NN (Nos 1-27), [KRK2021] SC-NNA (Nos 12A-12B, 17A-17I, 27A-27E). Figs 25-30, Table 7: [KRK2021] PER-NA (Nos 1A-1B, 2A-2B), [KRK2021] POB3-N (Nos 1-2), [KRK2021] MSW-N (Nos 1-4), [KRK2021] VCG4-N (Nos 1-5), [KRK2021] CFN-N (Nos 1-2), [KRK2021] CHA-N (Nos 1-4), [KRK2021] CM-N (Nos 1-2).

Status at CDS : All or part of tables of objects will be ingested in SIMBAD with priority 1.

Simbad objects: 90

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Number of rows : 90
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 THA MGr 00 00 -62.0           ~ 540 0
2 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
3 LDN 1455 DNe 03 28 00.6480 +30 07 58.800           ~ 198 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 NAME Per Region reg 03 37 00.0 +31 15 00           ~ 296 0
7 Ass Per OB 2 As* 03 42.2 +33 26           ~ 350 0
8 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
9 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
10 Barnard 209 DNe 04 12.4 +28 19           ~ 24 0
11 LDN 1495 DNe 04 18.1 +27 37           ~ 408 1
12 Barnard 213 DNe 04 20 51 +27 16.3           ~ 249 0
13 [KC2019] Theia 230 As* 04 25 13.8 +12 39 18           ~ 2 0
14 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1453 0
15 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
16 [KC2019] Theia 71 As* 04 30 44.2 +20 17 08           ~ 3 0
17 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 823 1
18 NAME Kutner's Cloud MoC 04 32 44.6 +24 23 13           ~ 283 0
19 LDN 1536 DNe 04 33 24.6 +22 43 29           ~ 114 0
20 LDN 1527 DNe 04 39 53 +25 45.0           ~ 689 0
21 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
22 LDN 1517 DNe 04 55 45 +30 33.0           ~ 127 0
23 [KC2019] Theia 44 As* 05 01 10.0 +08 53 41           ~ 4 0
24 UPK 385 OpC 05 03 07.2 +12 58 17           ~ 18 0
25 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 965 0
26 * bet Ori s*b 05 14 32.27210 -08 12 05.8981 -0.56 0.10 0.13 0.13 0.15 B8Ia 786 0
27 [KC2019] Theia 68 As* 05 24 23.64 +25 01 05.9           ~ 3 0
28 NAME 25 Ori Group OpC 05 24 50.9 +01 41 38           ~ 195 1
29 [KC2019] Theia 93 As* 05 25 37.93 +24 31 02.4           ~ 4 0
30 NAME 32 Ori group OpC 05 27 11 +06 16.0           ~ 84 0
31 NAME Orion D Cl* 05 28 -02.0           ~ 22 0
32 [KPR2005] 21 OpC 05 28 26.6 +03 33 00           ~ 75 0
33 NAME 118 Tau group Cl* 05 32 +24.0           ~ 24 0
34 Ass Ori OB 1b As* 05 34.0 -01 30           ~ 281 0
35 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
36 NAME Ori Complex Cld 05 35.3 -05 23           ~ 481 0
37 NAME Ori I As* 05 38 -02.8           ~ 653 0
38 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
39 [KC2019] Theia 116 As* 06 04 01.91 +16 17 25.2           ~ 7 0
40 NGC 2168 OpC 06 09 07.5 +24 20 15           ~ 604 0
41 NGC 2232 OpC 06 27 45.6 -04 44 26           ~ 212 0
42 [KC2019] Theia 69 As* 06 50 41.31 -14 10 32.1           ~ 3 0
43 [LP2019] 2439 OpC 06 54 21 -05 53.6           ~ 6 0
44 NGC 2322 GiG 07 06 00.3037261104 +50 30 37.145875212   14.6   12.76   ~ 20 0
45 Cl Alessi 36 OpC 07 06 57.9 -37 43 27           ~ 38 0
46 Cl Collinder 135 OpC 07 17 23.6 -36 57 23           ~ 124 0
47 Cl Collinder 140 OpC 07 23 23.9 -31 58 15           ~ 154 0
48 NGC 2451A OpC 07 42 55.4 -38 15 05           ~ 159 0
49 NGC 2451B OpC 07 44 22.6 -37 53 00           ~ 125 0
50 NGC 2506 OpC 08 00 02.3 -10 46 22   8.28 7.6     ~ 313 0
51 Ass Vel OB 2 As* 08 09 22.478 -47 21 03.46           ~ 307 0
52 NGC 2547 OpC 08 10 01.5 -49 12 08           ~ 445 0
53 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
54 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
55 Cl Mamajek 1 OpC 08 42 32.9 -78 57 47           ~ 392 0
56 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
57 NAME TW Hya Association As* 11 01.9 -34 42           ~ 1018 0
58 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
59 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 887 0
60 NAME eps Cha Association OpC 11 59 51 -78 12.4           ~ 188 0
61 NAME Lower Centaurus Crux As* 12 19 -57.1           ~ 565 1
62 NAME Cha II MoC 12 54 -77.2           ~ 361 0
63 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 894 0
64 [KC2019] Theia 94 As* 15 04 24.4 -79 47 04           ~ 4 0
65 NAME Upper Centaurus Lupus MGr 15 24 -41.9           ~ 567 1
66 Lupus 1 Cld 15 43 02.1 -34 09 06           ~ 320 0
67 Lupus 2 MoC 15 57 08 -37 47.1           ~ 119 1
68 NAME Lupus Complex SFR 16 03 -38.1           ~ 851 0
69 Lupus 4 MoC 16 03 12.4 -42 07 43           ~ 163 0
70 Lupus 3 SFR 16 09.6 -39 03           ~ 348 0
71 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
72 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
73 NAME rho Oph Complex reg 16 25 -23.5           ~ 79 1
74 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
75 NAME V1062 Sco Moving Group MGr 16 42 -39.7           ~ 9 0
76 [KC2019] Theia 70 As* 17 08 58.40 -17 19 02.7           ~ 2 0
77 [KC2019] Theia 67 As* 17 19 01.2613 -25 03 29.603           ~ 5 0
78 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1195 1
79 NAME Aql Region reg 18 31.1 -02 10           ~ 456 0
80 NAME Corona Australis Cloud MoC 19 01 51 -36 58.9           ~ 554 0
81 * eta Tel PM* 19 22 51.2060774616 -54 25 26.145617376   5.035 5.020   4.99 A0V 228 0
82 [KC2019] Theia 53 As* 19 57 38.8 -07 08 07           ~ 5 0
83 NAME Cepheus Region reg 21 20 00.0 +72 30 00           ~ 126 0
84 [KPR2005] 123 OpC 22 42 14.8 +54 00 20           ~ 49 0
85 NAME Cepheus Flare MoC 23 34 +72.0           ~ 142 0
86 NAME Libra ? ~ ~           ~ 26 0
87 NAME e Tau Association MGr ~ ~           ~ 20 0
88 Ass Ori OB 1a As* ~ ~           ~ 237 0
89 NAME Vela Field reg ~ ~           ~ 200 0
90 NAME Lyra reg ~ ~           ~ 62 0

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