2022A&A...666A..96C

Query : 2022A&A...666A..96C

2022A&A...666A..96C - Astronomy and Astrophysics, volume 666A96 (2022/10-1)

Stellar population in the vicinity of the H II region G331.03-00.15.

CARDENAS S.B., BLANCO A.B., GAMEN R. and CICHOWOLSKI S.

Abstract (from CDS):

We present a multi-wavelength study of the H II region G331.03-00.15, with the aim of identifying the population of massive stars associated with it. The distributions of ionised gas and heated dust both exhibit similar spherical forms, while the bordering photo-dissociating region follows a very ring-like distribution, indicating the presence of abundant neighbouring molecular material being photo-dissociated. There is only one high-mass star catalogued in the region, namely, the WR star 1051-67L. Based on an energy analysis of the detected radio continuum emission, we deduced that additional high-mass stars could be interacting with G331.03-00.15. We conducted a search of massive star candidates by applying a series of colour criteria to a sample of highly reddened infrared (IR) point sources projected over the radio continuum morphology, with the additional condition that they be located at the same distance assumed for the region. Fourteen candidate sources were selected and classified using low-resolution, near-infrared (NIR) spectroscopic data in the H and K bands, obtained with Gemini/FLAMINGOS-2. We identified one massive star and classified it as an O7 V star. Adding the contribution from this new star to the total ionising radiation available, we concluded that it would be possible for the H II region to be powered solely by these two massive stars. However, we do not rule out the possibility that there could be more early-type stars that remain undetected in this highly obscured part of the Galaxy. Additionally, we searched for primary tracers of star-forming activity and identified several class I and II candidate young stellar objects (YSOs), positioned over the dense clouds and clumps of molecular material found in the area. The presence of several maser species located in the densest cloud are also indicative of massive star formation taking place in the vicinity of G331.03-00.15.

Abstract Copyright: © S. B. Cárdenas et al. 2022

Journal keyword(s): H ii regions - stars: massive - stars: individual: WR 1051-67L

Simbad objects: 53

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Number of rows : 53
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 HD 142258 * 15 56 03.3008900016 -52 56 56.209492860   8.91 8.86     B9V 14 0
2 VVV J160931.53-514957.2 * 16 09 31.54 -51 49 57.2           ~ 1 0
3 VVV J160932.52-515144.4 * 16 09 32.52 -51 51 44.4           ~ 1 0
4 VVV J160935.51-514908.7 * 16 09 35.518 -51 49 08.75           A5V 1 0
5 VVV J160936.51-514919.5 * 16 09 36.510 -51 49 19.52           K0III 1 0
6 VVV J160939.63-514954.6 * 16 09 39.632 -51 49 54.62           G8-K0III 1 0
7 SSTGLMC G331.0083-00.0756 Y*? 16 09 40.192 -51 47 59.94           ~ 1 0
8 VVV J160941.54-515015.7 * 16 09 41.540 -51 50 15.76           K0III 1 0
9 VVV J160942.79-515318.1 * 16 09 42.799 -51 53 18.17           K1III 1 0
10 2MASS J16094325-5150392 Y*? 16 09 43.25976 -51 50 39.2712           ~ 2 0
11 VVV J160943.34-515233.5 * 16 09 43.350 -51 52 33.54           F5-G: 1 0
12 VVV J160943.41-515229.4 * 16 09 43.420 -51 52 29.42           K1III 1 0
13 VVV J160944.41-515109.7 * 16 09 44.410 -51 51 09.76           F5V 1 0
14 VVV J160945.13-514838.3 * 16 09 45.130 -51 48 38.38           G8-K0III 1 0
15 VVV J160945.40-515103.3 * 16 09 45.407 -51 51 03.30           A5V 1 0
16 VVV J160945.71-514917.9 * 16 09 45.716 -51 49 17.99           F5-G: 1 0
17 VVV J160947.27-514918.3 * 16 09 47.277 -51 49 18.36           K3V 1 0
18 VVV J160947.46-514918.3 * 16 09 47.467 -51 49 18.38           F0V 1 0
19 VVV J160948.28-514731.2 * 16 09 48.29 -51 47 31.3           ~ 1 0
20 SSTGLMC G330.9566-00.1641 Y*? 16 09 48.711 -51 54 00.06           ~ 1 0
21 SSTGLMC G330.9433-00.1795 Y*? 16 09 48.981 -51 55 13.57           ~ 1 0
22 VVV J160949.12-514918.7 * 16 09 49.120 -51 49 18.73           K4III 1 0
23 VVV J160950.31-515225.0 * 16 09 50.317 -51 52 25.03           F0V 1 0
24 2MASS J16095110-5148454 Y*? 16 09 51.107 -51 48 45.48           ~ 3 0
25 VVV J160952.36-515259.5 * 16 09 52.360 -51 52 59.56           F0V 1 0
26 IRAS 16060-5146 HII 16 09 52.776 -51 54 52.20           ~ 44 0
27 VVV J160954.01-515326.7 * 16 09 54.010 -51 53 26.74           A5V 1 0
28 2MASS J16095429-5148599 Y*? 16 09 54.29592 -51 48 59.9292           ~ 2 0
29 SPICY 33385 Y*? 16 09 57.273 -51 52 37.06           ~ 2 0
30 VVV J160957.36-515423.0 * 16 09 57.369 -51 54 23.06           K4III 1 0
31 2MASS J16095777-5154173 Y*? 16 09 57.77088 -51 54 17.3484           ~ 2 0
32 VVV J160958.13-514945.6 * 16 09 58.140 -51 49 45.70           K1III 1 0
33 VVV J161000.61-514921.2 * 16 10 00.610 -51 49 21.29           K4III 1 0
34 2MASS J16100277-5149322 Y*? 16 10 02.77872 -51 49 32.2968           ~ 2 0
35 WR 72-4 WR* 16 10 06.660 -51 47 24.65           WC7 4 0
36 VVV J161007.73-515003.7 * 16 10 07.740 -51 50 03.73           O7V 1 0
37 VVV J161008.18-514739.9 * 16 10 08.180 -51 47 39.98           G8-K0: 1 0
38 VVV J161008.68-515042.3 * 16 10 08.690 -51 50 42.36           A5V 1 0
39 VVV J161010.89-514732.9 * 16 10 10.899 -51 47 32.93           F5V 1 0
40 VVV J161011.34-515036.1 * 16 10 11.347 -51 50 36.14           K0III 1 0
41 GAL 331.03-00.15 HII 16 10 11 -51 49.1           ~ 11 0
42 SSTGLMC G331.0834-00.1156 Y*? 16 10 12.135 -51 46 42.18           ~ 1 0
43 SPICY 33464 Y*? 16 10 13.723 -51 48 23.65           ~ 2 0
44 SSTGLMC G331.0019-00.2205 Y*? 16 10 16.563 -51 54 38.82           ~ 1 0
45 VVV J161017.71-515020.6 * 16 10 17.710 -51 50 20.69           F0V 1 0
46 SPICY 33485 Y*? 16 10 23.029 -51 45 20.20           ~ 3 0
47 SSTGLMC G331.0196-00.2284 Y*? 16 10 23.689 -51 54 16.45           ~ 1 0
48 2MASS J16102859-5147576 Y*? 16 10 28.59048 -51 47 57.6636           ~ 2 0
49 SPICY 33510 Y*? 16 10 29.25720 -51 54 23.4252           ~ 3 0
50 2MASS J16102952-5149158 Y*? 16 10 29.52792 -51 49 15.8592           ~ 2 0
51 SPICY 33528 Y*? 16 10 33.568 -51 51 17.42           ~ 2 0
52 SPICY 33549 Y*? 16 10 38.742 -51 47 19.58           ~ 2 0
53 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0

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