2012A&A...543A..23P


Query : 2012A&A...543A..23P

2012A&A...543A..23P - Astronomy and Astrophysics, volume 543A, 23-23 (2012/7-1)

Study of the luminous blue variable star candidate G26.47+0.02 and its environment.

PARON S., COMBI J.A., PETRIELLA A. and GIACANI E.

Abstract (from CDS):

The luminous blue variable (LBV) stars are peculiar very massive stars. The study of these stellar objects and their surroundings is important for understanding the evolution of massive stars and its effects on the interstellar medium. We study the LBV star candidate G26.47+0.02. Using several large-scale surveys in different frequencies we performed a multiwavelength study of G26.47+0.02 and its surroundings. We found a molecular shell (seen in the 13CO J=1-0 line) that partially surrounds the mid-infrared nebula of G26.47+0.02, which suggests an interaction between the strong stellar winds and the molecular gas. From the HI absorption and the molecular gas study we conclude that G26.47+0.02 is located at a distance of ∼4.8kpc. The radio continuum analysis shows both thermal and non-thermal emission toward this LBV candidate, pointing to wind-wind collision shocks from a binary system. This hypothesis is supported by a search of near-IR sources and the Chandra X-ray analysis. Additional multiwavelength and long-term observations are needed to detect some possible variable behavior, and if that is found, to confirm the binary nature of the system.

Abstract Copyright:

Journal keyword(s): stars: individual: G26.47+0.02 - stars: winds, outflows - ISM: clouds - stars: massive

CDS comments: Paragraph.1 G79.49+0.26 is a misprint for G79.29+0.46.

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 HD 90177 s*b 10 22 53.8430096928 -59 37 28.363616256 9.16 9.66 8 8.15   LBV 320 0
2 * eta Car Em* 10 45 03.5377808928 -59 41 04.051599720 6.37 7.03 6.48 4.90 4.41 OBepec 2350 0
3 V* AG Car WR* 10 56 11.5781414448 -60 27 12.810673260 7.00 7.57 6.96 7.73   WN11h 615 0
4 [B61] 2 s*b 17 41 35.4358256400 -30 06 38.782127520   18.0 15.00 14.23 10.30 LBV_B[e]: 44 0
5 [FMM95] 3 s*b 17 46 15.240 -28 50 03.58           LBV 147 1
6 SNR G012.8-00.2 SFR 18 14 14.0 -17 55 50           ~ 242 0
7 V* V481 Sct s*b 18 33 55.2781965336 -06 58 38.631350604           LBV_B[e]: 48 0
8 AX J1839.5-0544 X 18 39 31 -05 44.6           ~ 2 0
9 2MASS J18393143-0544132 NIR 18 39 31.431 -05 44 13.28           ~ 1 0
10 GPSR5 26.470+0.025 Rad 18 39 31.49 -05 44 13.0           ~ 4 0
11 BGPS G026.469+00.021 smm 18 39 32.1886 -05 44 22.006           ~ 5 0
12 MSX6C G026.4700+00.0207 s*b 18 39 32.2472383848 -05 44 20.185351872           LBV_B 40 1
13 2MASS J18393228-0544148 NIR 18 39 32.2952482296 -05 44 14.548743096           ~ 1 0
14 IRAS 18576+0341 s*b 19 00 10.89456 +03 45 47.1096           B8I 85 1
15 IRAS 20298+4011 Em* 20 31 42.2846664600 +40 21 59.074415640     15.1     B:I[e] 90 0

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2022.11.27-10:18:38

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