2015MNRAS.448.1687S

Query : 2015MNRAS.448.1687S

2015MNRAS.448.1687S - Mon. Not. R. Astron. Soc., 448, 1687-1703 (2015/April-1)

Isolating the pre-main sequence in Collinder 34, NGC 3293, NGC 3766 and NGC 6231.

SAURIN T.A., BICA E. and BONATTO C.

Abstract (from CDS):

We employed field star decontaminated Two Micron All Sky Survey photometry to study four nearby optical embedded clusters - Collinder 34, NGC 3293, NGC 3766 and NGC 6231 - obtaining deep colour-magnitude diagrams and stellar radial density profiles. We found what seem to be pre-main sequences detached in different amounts from main sequences in these diagrams. The structural analysis of each cluster revealed different radial distributions for these two sequences. We argued that the detached evolutionary sequences in our sample may be evidence of sequential star formation. Finally, we compared the sample cluster parameters with those of other young clusters in the literature and point out evidence that NGC 3766 and NGC 6231 might be evolving to OB associations.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): open clusters and associations: individual: Collinder 34 - open clusters and associations: individual: NGC 3293 - open clusters and associations: individual: NGC 3766 - open clusters and associations: individual: NGC 6231

CDS comments: BH NNN = Cl VDBH NNN in SIMBAD.

Simbad objects: 92

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Number of rows : 92
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 IC 1805 OpC 02 32 52.1 +61 28 36           ~ 542 1
2 CG 7S CGb 02 34 39 +61 23.3           ~ 5 0
3 Ass Cas OB 6 As* 02 43 +61.3           ~ 128 0
4 IC 1848 OpC 02 51 19.4 +60 25 32   6.87 6.5     ~ 522 2
5 IRAS 02476+5950 Cld 02 51 29.0 +60 03 14           ~ 18 0
6 SAI 23 OpC 02 54 05.0 +60 39 52           ~ 2 0
7 SFO 12 Cld 02 54 58.0 +60 36 06           ~ 24 0
8 [BDS2003] 58 Cl* 02 57 28 +60 41.6           ~ 2 0
9 SAI 24 OpC 02 59 10.8 +60 33 42           ~ 29 0
10 C 0255+602 Cl* 02 59.3 +60 24     5.9     ~ 17 0
11 BSD 9-868 * 02 59 21.1948687392 +60 25 21.998689032   10.26 9.97     A0/2V 8 0
12 Cl Collinder 34 OpC 02 59 23.00 +60 34 00.0     6.8     ~ 13 0
13 HD 18326 Y*O 02 59 23.1709737312 +60 33 59.519691216 9.211 8.21 7.94     O6.5V((f))z+O9/B0V: 142 0
14 IRAS 02570+6028 Cld 03 01 00.7 +60 40 20           ~ 37 0
15 NAME W 5 East MoC 03 01 32 +60 29.2           ~ 130 2
16 HH 163 HH 03 01 32.709 +60 29 11.79           ~ 3 0
17 SH 2-201 HII 03 03 17.9 +60 27 52           ~ 118 0
18 Cl Bochum 1 OpC 06 25 18 +19 46.8   8.08 7.9     ~ 52 1
19 NGC 2244 OpC 06 32 06.9 +04 54 19           ~ 673 1
20 ESO 313-13 OpC 08 44 51.8 -41 17 02   7.01 6.7     ~ 95 0
21 WR 20 WR* 10 19 18.4020394728 -59 09 38.849457528   15.34 14.60     WN5-w 38 0
22 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49           ~ 400 0
23 Cl Collinder 220 OpC 10 25 44.7 -57 55 38           ~ 39 0
24 HD 90657 WR* 10 26 31.4087563344 -58 38 26.182481568 9.53 10.07 9.65 9.84   WN5+O4-6 169 0
25 IC 2581 OpC 10 27 29.3 -57 37 31   4.79 4.3     ~ 143 0
26 C 1026-579 OpC 10 28.4 -58 08           ~ 20 0
27 Cl Loden 143 OpC 10 28 54 -58 47.0           ~ 29 0
28 Cl Ruprecht 90 OpC 10 31 00 -58 27.0           ~ 22 0
29 Cl Loden 112 OpC 10 32 20 -56 41.7           ~ 17 0
30 Cl Loden 153 OpC 10 34 41 -58 07.8           ~ 29 1
31 NGC 3293 OpC 10 35 50.3 -58 14 04           ~ 327 0
32 V* V439 Car Be* 10 35 53.1734966664 -58 13 57.129939732   13.76 13.35 13.23   ~ 5 0
33 CPD-57 3520 * 10 35 56.6006833200 -58 12 40.880547036 9.61 10.23 10.23 10.19 10.15 B2V 24 0
34 C 1035-584 OpC 10 36 05 -58 43.5           ~ 21 0
35 V* V906 Car No* 10 36 15.4286177568 -59 35 53.696262804           ~ 108 1
36 NGC 3324 OpC 10 37 20.8 -58 37 26           ~ 145 1
37 Cl VDBH 99 OpC 10 38 23.9 -59 09 28           ~ 91 0
38 [DB2002b] G286.23+0.09 DNe 10 38.4 -58 24           ~ 4 0
39 DSH J1039.9-5911 OpC 10 39 59.0 -59 11 31           ~ 15 1
40 HD 92740 WR* 10 41 17.5158425712 -59 40 36.895992960 5.68 6.50 6.42 7.38   WN7h+O9III-V 426 0
41 HD 92809 WR* 10 41 38.3243333544 -58 46 18.723223308 8.95 9.28 9.03 9.60   WC6 163 0
42 Cl Bochum 10 OpC 10 42 14.2 -59 08 44   6.40 6.2     ~ 86 0
43 [MS70] 1 WR* 10 44 32.1161133312 -57 50 23.983274544   14.71 13.54 13.26   WN5 42 0
44 LSWR 4 WR* 10 44 38.0518597224 -58 48 28.806098832   14.95 13.70 13.39   WC6+OB 40 0
45 Cl Trumpler 15 OpC 10 44 43.6 -59 22 07           ~ 229 0
46 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 1071 2
47 Cl Trumpler 19 OpC 11 14 30.6 -57 33 49     9.6     ~ 33 0
48 [DB2002b] G293.07+0.58 MoC 11 29 33 -60 42.5           ~ 6 0
49 [DB2002b] G293.31+0.12 MoC 11 30 10 -61 13.4           ~ 7 0
50 Cl Ruprecht 164 OpC 11 30 26.8 -60 45 02           ~ 34 0
51 Cl Loden 402 OpC 11 32 52 -60 43.0           ~ 22 0
52 [DB2002b] G294.06-0.67 DNe 11 34.2 -62 13           ~ 3 0
53 SNR G293.8+00.6 SNR 11 35 00 -60 54.0           ~ 40 0
54 CPD-60 3120 * 11 36 08.2502552952 -61 34 19.384238280   10.67 10.70     B4V 13 0
55 SNR G294.1-00.0 SNR 11 36.2 -61 38           ~ 18 0
56 NGC 3766 OpC 11 36 13.5 -61 36 42   5.66 5.3     ~ 222 0
57 [DB2002b] G294.30-0.11 MoC 11 37 33 -61 44.6           ~ 6 0
58 [W65] c18 WR* 11 38 05.0961216840 -62 16 01.900054200   14.985 13.921 13.599   WC6 41 1
59 [KPR2005] 67 OpC 11 41 24.9 -61 02 43           ~ 26 0
60 [KPS2012] MWSC 1964 OpC 11 41 35 -62 25.5           ~ 10 0
61 C 1140-622 OpC 11 42 14 -62 30.6           ~ 11 0
62 [DB2002b] G294.90+0.05 MoC 11 42 51 -61 44.4           ~ 7 0
63 C 1141-608 OpC 11 43 39 -61 09.3           ~ 10 0
64 Cl Stock 14 OpC 11 43 45.2 -62 31 12   6.33 6.3     ~ 84 0
65 ESO 129-32 OpC 11 44 11 -61 03.5           ~ 12 0
66 Cl Loden 467 OpC 11 44 58 -62 28.6           ~ 9 0
67 WR 45a WR* 11 46 18.1512566088 -61 24 41.539355172           WN5o 7 0
68 [FSR2007] 1595 OpC 11 47 03.9 -62 38 21           ~ 21 0
69 [DB2002b] G295.42+0.50 MoC 11 48 01 -61 26.1           ~ 6 0
70 [DB2002b] G295.46+0.44 MoC 11 48 10 -61 30.6           ~ 6 0
71 WR 45b WR* 11 48 46.0326730008 -62 23 02.658292656           WN5b 5 0
72 SAI 116 OpC 11 49 16.6 -62 13 19           ~ 25 0
73 TGU H1822 P1 MoC 11 49 59 -58 33.1           ~ 9 0
74 NGC 4755 OpC 12 53 39.2 -60 22 07           ~ 300 0
75 SNR G342.1+00.9 SNR 16 50.7 -43 04           ~ 19 0
76 HD 151932 WR* 16 52 19.2477039480 -41 51 16.270066224 6.06 6.79 6.51 7.64   WN7h 326 0
77 GUM 55 HII 16 53 -42.2           ~ 26 0
78 NAME Sco OB 1 As* 16 53.5 -41 57           ~ 222 0
79 NGC 6231 33 Y*? 16 53 46.9871839944 -41 48 54.948359880 12.400 12.621 12.375 12.60 11.962 B6-8V 12 0
80 HD 152248 Y*O 16 54 10.0618206816 -41 49 30.139291596 5.56 6.15 6.088     O7Iabf+O7Ib(f) 270 0
81 NGC 6231 OpC 16 54 14.4 -41 48 53           ~ 562 0
82 HD 152270 WR* 16 54 19.6991292072 -41 49 11.531710092 6.26 6.80 6.597 6.72 6.39 WC7+O5-8 315 0
83 HD 152408 WR* 16 54 58.5051071856 -41 09 03.093075612 5.17 5.92 5.77 7.00   O8Iape 388 0
84 Cl VDBH 202 OpC 16 55 08.3 -40 57 01           ~ 29 0
85 C 1652-407 OpC 16 55 30.00 -40 50 00.0     3.4     ~ 12 0
86 Cl VDBH 205 OpC 16 56 21.7 -40 38 01           ~ 39 0
87 Cl Trumpler 24 OpC 16 57 00 -40 40.0     8.6     ~ 74 0
88 Cl VDBH 211 OpC 17 02 07.4 -41 07 03           ~ 32 0
89 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
90 M 16 OpC 18 18 45.1 -13 47 31           ~ 1084 1
91 NGC 6823 OpC 19 43 11.3 +23 18 32   7.71 7.1     ~ 279 2
92 IC 1396 OpC 21 38 51.4 +57 31 52           ~ 523 1

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