2016AJ....152...74B

Query : 2016AJ....152...74B

2016AJ....152...74B - Astron. J., 152, 74-74 (2016/September-0)

Young stellar clusters containing massive young stellar objects in the VVV survey.

BORISSOVA J., RAMIREZ ALEGRIA S., ALONSO J., LUCAS P.W., KURTEV R., MEDINA N., NAVARRO C., KUHN M., GROMADZKI M., RETAMALES G., FERNANDEZ M.A., AGURTO-GANGAS C., CHENE A.-N., MINNITI D., CONTRERAS PENA C., CATELAN M., DECANY I., THOMPSON M.A., MORALES E.F.E. and AMIGO P.

Abstract (from CDS):

The purpose of this research is to study the connections of the global properties of eight young stellar clusters projected in the Vista Variables in the Via Lactea (VVV) ESO Large Public Survey disk area and their young stellar object (YSO) populations. The analysis is based on the combination of spectroscopic parallax-based reddening and distance determinations with main-sequence and pre-main-sequence ishochrone fitting to determine the basic parameters (reddening, age, distance) of the sample clusters. The lower mass limit estimations show that all clusters are low or intermediate mass (between 110 and 1800 M☉), the slope Γ of the obtained present-day mass functions of the clusters is close to the Kroupa initial mass function. The YSOs in the cluster's surrounding fields are classified using low resolution spectra, spectral energy distribution fits with theoretical predictions, and variability, taking advantage of multi-epoch VVV observations. All spectroscopically confirmed YSOs (except one) are found to be massive (more than 8 M☉). Using VVV and GLIMPSE color-color cuts we have selected a large number of new YSO candidates, which are checked for variability and 57% are found to show at least low-amplitude variations. In few cases it was possible to distinguish between YSO and AGB classifications on the basis of light curves.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): infrared: stars - open clusters and associations: individual: (VVV CL010, VVV CL012, VVV CL013, VVV CL059, [DBS2003] 93, [DBS2003] 100, [DBS2003] 130) - stars: pre-main sequence - stars: variables: general

Nomenclature: Fig. 1, Table 2: [BRA2016] CLNNN ObjN N=10, [BRA2016] DBSNNN ObjN N=11. Table 4: [BRA2016] CLNNN ysocN N=22, [BRA2016] DBSNNN ysocNN N=26.

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 ESO 95-1 HII 12 09 01.260 -63 15 59.63     16.00     ~ 96 2
2 2MASS J12090127-6315597 * 12 09 01.271 -63 15 59.78           ~ 1 0
3 2MASS J12090156-6315429 Y*? 12 09 01.5738575736 -63 15 43.035501348           ~ 2 0
4 [DBS2003] 75 OpC 12 09 02 -63 15.9           ~ 8 0
5 [MHL2007] G298.1829-00.7860 4 Y*? 12 09 02.128 -63 15 51.43           ~ 2 0
6 [MHL2007] G298.1829-00.7860 6 Y*? 12 09 02.622 -63 15 54.14           ~ 2 0
7 [HSL2000] IRS 2 IR 12 11 45.72 -61 46 19.8           ~ 3 0
8 [BRA2016] CL010 Obj2 Y*? 12 11 46.5202143024 -61 46 07.060043460           ~ 2 0
9 VVV CL010 Cl* 12 11 47 -61 46.4           ~ 3 0
10 IRAS 12091-6129 of? 12 11 47.65 -61 46 20.9           ~ 27 0
11 [BRA2016] CL010 Obj1 * 12 11 47.683 -61 46 18.87           ~ 1 0
12 SPICY 12472 Y*? 12 11 49.482 -61 46 36.73           ~ 2 0
13 [BRA2016] CL012 ysoc4 Y*? 12 20 12.078 -62 52 38.96           ~ 1 0
14 2MASS J12201216-6253002 Y*? 12 20 12.1663676952 -62 53 00.182155488           ~ 2 0
15 [BRA2016] CL012 ysoc1 Y*? 12 20 13.087 -62 53 54.24           ~ 1 0
16 VVV CL012 Cl* 12 20 14 -62 53.1           ~ 4 0
17 IRAS 12175-6236 IR 12 20 14.4 -62 53 01           ~ 5 0
18 [BRA2016] CL012 Obj1 * 12 20 14.9951516808 -62 52 55.379828100           ~ 1 0
19 2MASS J12201528-6253269 Y*? 12 20 15.290 -62 53 26.96           ~ 3 0
20 [BRA2016] CL012 ysoc2 Y*? 12 20 18.744 -62 53 33.65           ~ 1 0
21 AGAL G300.323-00.199 Y*O 12 28 27.98784 -62 57 13.9680           ~ 14 0
22 [BRA2016] CL013 ysoc7 Y*? 12 28 30.298 -62 57 37.44           ~ 1 0
23 [BRA2016] CL013 ysoc9 Y*? 12 28 30.893 -62 57 34.70           ~ 1 0
24 [BRA2016] CL013 ysoc1 Y*? 12 28 33.212 -62 58 22.76           ~ 1 0
25 [BRA2016] CL013 ysoc5 Y*? 12 28 34.366 -62 57 55.55           ~ 1 0
26 IRAS 12257-6241 Y*O 12 28 35.75088 -62 58 35.2272           ~ 6 0
27 [BRA2016] CL013 ysoc8 Y*? 12 28 35.947 -62 59 12.08           ~ 1 0
28 2MASS J12283696-6258241 * 12 28 36.9785010240 -62 58 24.638799828           ~ 1 0
29 VVV CL013 Cl* 12 28 37 -62 58.4           ~ 3 0
30 2MASS J12283744-6258268 * 12 28 37.4536290528 -62 58 26.934818196           ~ 1 0
31 [BRA2016] CL013 ysoc3 Y*? 12 28 38.844 -62 57 33.62           ~ 1 0
32 [BRA2016] CL013 ysoc4 Y*? 12 28 39.470 -62 59 10.28           ~ 1 0
33 [BRA2016] CL013 ysoc2 Y*? 12 28 40.044 -62 57 42.30           ~ 1 0
34 2MASS J12284181-6258015 LP? 12 28 41.8331369909 -62 58 01.663947447           ~ 4 0
35 [BRA2016] DBS130 ysoc1 Y*? 13 11 41.059 -62 46 30.32           ~ 1 0
36 [BRA2016] DBS130 ysoc3 Y*? 13 11 45.264 -62 46 35.98           ~ 1 0
37 [BRA2016] DBS130 ysoc5 Y*? 13 11 51.199 -62 46 41.45           ~ 1 0
38 [BRA2016] DBS130 ysoc2 Y*? 13 11 51.683 -62 47 03.08           ~ 1 0
39 [DBS2003] 130 Cl* 13 11 54 -62 47.0           ~ 8 0
40 [BRA2016] DBS130 Obj1 * 13 11 54.189 -62 47 01.14           ~ 1 0
41 2MASS J13115442-6247078 LP? 13 11 54.4479503293 -62 47 07.912884867           O8-9? 6 0
42 [BRA2016] DBS130 ysoc4 Y*? 13 12 02.424 -62 47 22.99           ~ 1 0
43 [DBS2003] 132 Cl* 13 12 18 -62 42.3           ~ 9 0
44 Cl Danks 1 OpC 13 12 29.0 -62 41 56           ~ 80 0
45 Cl Danks 2 OpC 13 12 53.3 -62 40 52           ~ 73 0
46 NAME G305 Complex SFR 13 13 -62.7           ~ 72 0
47 GRS G308.60 +00.60 HII 13 39.9 -61 45           ~ 108 0
48 [BRA2016] DBS93 ysoc6 Y*? 15 18 24.861 -56 38 36.46           ~ 1 0
49 [BRA2016] DBS93 ysoc1 Y*? 15 18 28.232 -56 38 42.65           ~ 1 0
50 [BRA2016] DBS93 ysoc4 Y*? 15 18 28.789 -56 38 09.53           ~ 1 0
51 [BRA2016] DBS93 ysoc9 Y*? 15 18 31.443 -56 40 05.12           ~ 1 0
52 [BRA2016] DBS93 ysoc2 Y*? 15 18 34.476 -56 40 27.84           ~ 1 0
53 [BRA2016] DBS93 ysoc11 Y*? 15 18 36.065 -56 39 14.26           ~ 1 0
54 [BRA2016] DBS93 Obj1 * 15 18 36.1399031928 -56 38 28.561639668           ~ 1 0
55 [BRA2016] DBS93 ysoc5 Y*? 15 18 36.489 -56 38 34.55           ~ 1 0
56 [DBS2003] 93 OpC 15 18 37 -56 38.7           ~ 8 0
57 GAL 322.16+00.62 HII 15 18 39.1 -56 38 49           ~ 29 0
58 TYC 8702-1036-1 * 15 18 39.6538401264 -56 38 48.009691788   11.93 11.06     ~ 1 0
59 [BRA2016] DBS93 ysoc3 Y*? 15 18 42.993 -56 39 47.09           ~ 1 0
60 [BRA2016] DBS93 ysoc7 Y*? 15 18 43.166 -56 37 27.23           ~ 1 0
61 [BRA2016] DBS93 ysoc10 Y*? 15 18 44.962 -56 39 44.57           ~ 1 0
62 [BRA2016] DBS93 ysoc8 Y*? 15 18 46.959 -56 37 52.64           ~ 1 0
63 [BRA2016] CL059 ysoc1 Y*? 16 05 49.326 -50 47 29.44           ~ 1 0
64 [BRA2016] CL059 ysoc5 Y*? 16 05 51.744 -50 46 49.58           ~ 1 0
65 VVV CL059 Cl* 16 05 52 -50 47.8           ~ 3 0
66 [BRA2016] CL059 ysoc6 Y*? 16 05 52.018 -50 47 06.97           ~ 1 0
67 [BRA2016] CL059 Obj1 * 16 05 52.295 -50 48 10.26           ~ 1 0
68 [BRA2016] CL059 ysoc7 Y*? 16 05 53.155 -50 47 15.14           ~ 1 0
69 SPICY 32816 Y*? 16 05 53.288 -50 47 22.26           ~ 2 0
70 [BRA2016] CL059 ysoc8 Y*? 16 05 54.3041356968 -50 48 34.363356120           ~ 1 0
71 [BRA2016] CL059 ysoc2 Y*? 16 05 57.367 -50 47 34.37           ~ 1 0
72 [BRA2016] CL059 ysoc3 Y*? 16 05 59.7994981248 -50 47 25.603705176           ~ 1 0
73 2MASS J16060217-5047477 Y*? 16 06 02.17944 -50 47 47.7744           ~ 2 0
74 GAL 332.80-00.60 HII 16 19 47 -51 04.1           ~ 103 1
75 [BRA2016] DBS100 ysoc8 Y*? 16 20 22.972 -50 54 24.88           ~ 1 0
76 2MASS J16202470-5054044 Y*? 16 20 24.70392 -50 54 04.4676           ~ 2 0
77 [BRA2016] DBS100 ysoc6 Y*? 16 20 24.997 -50 54 25.16           ~ 1 0
78 [BRA2016] DBS100 ysoc7 Y*? 16 20 25.206 -50 54 17.64           ~ 1 0
79 [DBS2003] 100 OpC 16 20 25 -50 54.1           ~ 11 0
80 [BRA2016] DBS100 ysoc1 Y*? 16 20 25.587 -50 53 58.92           ~ 1 0
81 [BRA2016] DBS100 Obj1 EB* 16 20 26.6471297592 -50 54 04.655106864           ~ 4 0
82 UCAC4 196-132446 ** 16 20 26.771520 -50 54 17.22312       13.317   ~ 1 0
83 [BRA2016] DBS100 Obj3 * 16 20 27.108 -50 54 31.81           ~ 1 0
84 2MASS J16202714-5051553 Y*? 16 20 27.147 -50 51 55.36           ~ 3 0
85 2MASS J16202739-5054420 * 16 20 27.39432 -50 54 42.0012           ~ 2 0
86 [BRA2016] DBS100 ysoc5 Y*? 16 20 27.927 -50 54 03.24           ~ 1 0
87 2MASS J16202975-5053343 AB? 16 20 29.752 -50 53 34.34           ~ 3 0
88 2MASS J16203226-5052584 Y*? 16 20 32.270 -50 52 58.40           ~ 3 0
89 VVV CL086 OpC 16 48 15 -45 26.1           ~ 9 0
90 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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