2015MNRAS.449L..60K

Query : 2015MNRAS.449L..60K

2015MNRAS.449L..60K - Mon. Not. R. Astron. Soc., 449, L60-L64 (2015/May-1)

WS1: one more new Galactic bona fide luminous blue variable.

KNIAZEV A.Y., GVARAMADZE V.V. and BERDNIKOV L.N.

Abstract (from CDS):

In this Letter, we report the results of spectroscopic and photometric monitoring of the candidate luminous blue variable (LBV) WS1, which was discovered in 2011 through the detection of a mid-infrared circular shell and follow-up optical spectroscopy of its central star. Our monitoring showed that WS1 brightened in the B, V and I bands by more than 1 mag during the last three years, while its spectrum revealed dramatic changes during the same time period, indicating that the star became much cooler. The light curve of WS1 demonstrates that the brightness of this star has reached maximum in 2013 December and then starts to decline. These findings unambiguously proved the LBV nature of WS1 and added one more member to the class of Galactic bona fide LBVs, bringing their number to sixteen (an updated census of these objects is provided).

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

Journal keyword(s): line: identification - stars: emission-line, Be - stars: evolution - stars: individual: [GKM2012] WS1 - stars: massive

Simbad objects: 17

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Number of rows : 17
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 90177 s*b 10 22 53.8430096928 -59 37 28.363616256 9.16 9.66 8 8.15   LBV 342 0
2 * eta Car s*b 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 6.123 4.41 LBV 2543 0
3 V* AG Car WR* 10 56 11.5781414448 -60 27 12.810673260 7.00 7.57 6.96 7.73   WN11h 649 0
4 MR 35 s*b 11 08 40.0634208096 -60 42 51.721320060   12.33 10.20 11.66   LBV 130 0
5 UCAC2 3729120 s*b 13 36 28.6255407576 -63 45 38.735081280   17.36 15.31 14.87   LBV 7 0
6 WRAY 16-137 s*b 13 50 15.3659574432 -61 48 55.035208620     15.5     LBV 10 0
7 Cl* Westerlund 1 W 243 s*b 16 47 07.5040736160 -45 52 29.123491188   19.873 15.730     LBV 67 0
8 HD 160529 s*b 17 41 59.0261939376 -33 30 13.704456780 8.17 7.87 6.66 5.50 4.51 B8-A9Ia+ 203 1
9 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
10 GCIRS 34W WR* 17 45 39.73 -29 00 26.6           Ofpe/WN9 63 0
11 [NHS93] 22 WR* 17 46 05.625 -28 51 31.92           WN5b 27 0
12 [GMC99] D6 s*b 17 46 17.982 -28 49 03.46           LBV 66 0
13 HD 168607 s*b 18 21 14.8856951904 -16 22 31.763755236 10.23 9.82 8.28 8.55   B9Ia+ 196 1
14 EM* MWC 930 s*b 18 26 25.2364693368 -07 13 17.815243512   14.20 11.51 11.87 9.40 B5/9Iaeq 50 1
15 V* V481 Sct s*b 18 33 55.2781965336 -06 58 38.631350604           LBV_B[e]: 50 0
16 IRAS 18576+0341 s*b 19 00 10.89456 +03 45 47.1096           B8I 87 0
17 * P Cyg s*b 20 17 47.2019733389 +38 01 58.549132671 4.66 5.24 4.82 4.28 4.02 B1-2Ia-0ep 1200 1

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