2019AJ....158...46B

Query : 2019AJ....158...46B

2019AJ....158...46B - Astron. J., 158, 46-46 (2019/July-0)

The G305 star-forming region. I. Newly classified hot stars.

BORISSOVA J., ROMAN-LOPES A., COVEY K., MEDINA N., KURTEV R., ROMAN-ZUNIGA C., KUHN M.A., CONTRERAS PENA C., LUCAS P., RAMIREZ ALEGRIA S., MINNITI D., KOUNKEL M., STRINGFELLOW G., BARBA R.H. and SUAREZ G.

Abstract (from CDS):

The relatively nearby star-forming complex G305 is one of the most luminous H II regions in the Galaxy, and it contains several sites and epochs of star formation. Using a combination of near-infrared photometry from "Vista Variables in Via Lactea" ESO Large Public Survey, SDSS-IV APOGEE-2 spectra, and Gaia DR2 photometry and astrometry, we report on 29 OB type, Wolf-Rayet, and emission-line stars, 18 of which are newly classified. Most of these hot stars belongs to the main sequence, although some stars of class I are also proposed. The mean radial velocity is RV = -41.8 kms–1. The average spectroscopic distance is 3.2 ± 1.6 kpc, while the Gaia DR2 average distance is 3.7 ± 1.8 kpc. Eight objects show light-curve variations with amplitudes greater than 0.5 mag in the KS band.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): Galaxy: stellar content - infrared: stars - stars: massive - stars: Wolf-Rayet - stars: variables: general

Simbad objects: 43

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Number of rows : 43
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 1544 * 00 20 05.5412076504 +62 03 58.699956096 7.51 8.28 8.12     B0.5III(n) 74 0
2 BD+57 247 * 01 19 10.2720173016 +58 20 57.096955392 9.45 10.14 9.93     O9.7IV 35 0
3 NAME Crux-Scutum Spiral Arm reg 12 30 -60.0           ~ 323 0
4 2MASS J13103971-6243315 * 13 10 39.7290795451 -62 43 31.705964240           B3-4V 3 0
5 2MASS J13110621-6256547 Y*? 13 11 06.2243928787 -62 56 54.708277843           B2-3V 6 0
6 2MASS J13112057-6243378 * 13 11 20.5778347125 -62 43 37.834788420           B5-6V 4 0
7 2MASS J13112385-6240410 * 13 11 23.8513477705 -62 40 41.231255051           B0-1V 3 0
8 WR 48-11 WR* 13 11 35.60088 -62 45 32.4360           WN9h 8 0
9 2MASS J13113936-6233138 LP? 13 11 39.3608791518 -62 33 13.732898128           O9-B0 4 0
10 VVV CL021 Cl* 13 11 51 -62 36.9           ~ 5 0
11 [DBS2003] 130 Cl* 13 11 54 -62 47.0           ~ 8 0
12 2MASS J13115442-6247078 LP? 13 11 54.4479503293 -62 47 07.912884867           O8-9? 6 0
13 [HTU2013] G305.270-0.007 HII 13 11 55 -62 47.1           ~ 2 0
14 WR 48-6 WR* 13 12 09.0613442832 -62 43 26.718131640           WN8-9 11 0
15 WR 48-3 WR* 13 12 21.3224527736 -62 40 12.387259416       16.24   WC8 10 0
16 WR 48-7 WR* 13 12 25.4738527416 -62 44 41.785922724           WN9 12 0
17 2MASS J13122653-6243107 s*b 13 12 26.5262364573 -62 43 10.784360950           O6-7I 6 0
18 WR 48-9 WR* 13 12 28.5638209632 -62 41 43.769380128     14.96     WNLh 17 0
19 Cl Danks 1 OpC 13 12 29.0 -62 41 56           ~ 80 0
20 2MASS J13122965-6234341 * 13 12 29.6984303972 -62 34 34.119630071           O8-9? 3 0
21 2MASS J13123199-6243583 ** 13 12 31.99584 -62 43 58.3932           O6-7V 3 0
22 VVV CL022 Cl* 13 12 36 -62 37.3           ~ 7 0
23 2MASS J13123629-6239301 * 13 12 36.3051957103 -62 39 30.163914001           O5-6V 5 0
24 Cl Danks 2 OpC 13 12 53.3 -62 40 52           ~ 73 0
25 2MASS J13125612-6243503 * 13 12 56.0987665320 -62 43 50.347200900           O5-6V 4 0
26 NAME G305 Complex SFR 13 13 -62.7           ~ 72 0
27 2MASS J13130268-6242256 * 13 13 02.6883106895 -62 42 25.607428515           O7-8V 7 0
28 2MASS J13130841-6239275 EB* 13 13 08.4050209011 -62 39 27.507983775           O7-8V 8 0
29 VVV CL023 OpC 13 13 13 -62 33.4           ~ 5 0
30 2MASS J13131324-6245056 s*b 13 13 13.2482950250 -62 45 05.601615794           O4-5I 4 0
31 2MASS J13132400-6245070 Pe* 13 13 23.9922359920 -62 45 07.054504669           O6-7V 4 0
32 HD 114737 ** 13 13 45.5333080580 -63 35 11.718886112 7.43 8.19 8.00 8.92   O8.5III 67 0
33 HD 114886 ** 13 14 44.38260 -63 34 51.8077 6.15 6.98 6.89 7.76   O9-B0V 114 0
34 2MASS J13160379-6242218 s*b 13 16 03.7979550600 -62 42 21.873556296           OIf*/WN? 7 0
35 2MASS J13165540-6242318 Y*? 13 16 55.408 -62 42 31.86           ~ 4 0
36 2MASS J13165955-6247413 * 13 16 59.5588964044 -62 47 41.417500721           B4-5V 4 0
37 2MASS J13174367-6251410 * 13 17 43.7038391647 -62 51 40.982218057           B1-2V 5 0
38 2MASS J13181288-6239067 Y*? 13 18 12.8860177981 -62 39 06.726914070           B2-3V 5 0
39 HD 115455 SB* 13 18 35.3592390638 -62 29 28.407889555 7.40 8.17 7.97 8.81   O8III((f)) 109 1
40 VVV CL024 Cl* 13 18 45 -62 44.7           ~ 4 0
41 CPD-61 3587 Y*O 13 19 03.9700032233 -62 34 10.159085928 10.48 11.02 10.73 10.80   B2V 44 1
42 Cl Stock 16 OpC 13 19 26.4 -62 37 19           ~ 95 0
43 2MASS J13195292-6240096 EB* 13 19 52.9306528271 -62 40 09.697562422           B1-2V 5 0

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