2008A&A...484..463S

Query : 2008A&A...484..463S

2008A&A...484..463S - Astronomy and Astrophysics, volume 484, 463-467 (2008/6-3)

Wra751, a luminous blue variable developing an S Doradus cycle.

STERKEN C., VAN GENDEREN A.M., PLUMMER A. and JONES A.F.

Abstract (from CDS):

The object Wra 751 is a luminous blue variable that lately exhibits strong changes in light and color. We summarise the available photometry of Wra 751, present new photometric observations, and discuss these data with special attention on the systematic differences between the various data sources. In addition, we establish an empirical relationship between b-y and B-V for this class of stars. Wra 751 is a strong-active member of the S Dor class, and it exhibits very-long term S Doradus phases with an amplitude of about two magnitudes in V and a cycle length of several decades. The associated B-V colour-index amplitude is about 0.4 mag. At this moment this LBV, which is the reddest member of the class, is going through the bright (and red) stage of a long-term S Dor cycle.The S Dor behaviour of this system shows some resemblence to the temporal characteristics of the Galactic LBV AG Car, because the time scales and amplitudes of light and colour variability are very similar.

Abstract Copyright: ∼

Journal keyword(s): stars: variables: general - stars: individual: Wra 751 - stars: early-type - stars: supergiants - techniques: photometric

VizieR on-line data: <Available at CDS (J/A+A/484/463): table2.dat table3.dat table4.dat>

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 LHA 115-S 6 s*b 00 46 55.0295765376 -73 08 34.136808252 12.14 13.02 12.91   12.52 B0/0.5[e] 84 1
2 SK 61 * 00 55 47.6236244640 -72 39 31.250813832   13.280 13.268     B8 7 0
3 SK 119 s*b 01 04 58.0658804448 -72 39 59.515048656 11.57 10.12 12.34   12.23 B2Ia 33 0
4 HD 6884 s*b 01 07 18.2182685856 -72 28 03.657105156   10.32 10.2     B9Ia0ek 122 0
5 HD 269006 s*b 05 02 07.3942092168 -71 20 13.116800076 9.93 10.60 10.55 10.43 10.38 LBV 251 0
6 HD 269128 s*b 05 10 22.7893360416 -68 46 23.816621928 9.77 10.52 10.412 10.29 10.268 B2.5Ieq 104 0
7 V* S Dor sg* 05 18 14.3570612088 -69 15 01.149576912 9.08 10.39 10.25 9.74 9.14 Be3 378 0
8 HD 269662 sg* 05 30 51.4749432240 -69 02 58.590657600 10.23 10.52 10.28 10.40 10.390 A0Ia 103 0
9 HD 269700 s*b 05 31 52.2818122296 -68 32 38.857949016 9.71 10.56 10.54 10.38 10.38 B1.5Iaeq 84 0
10 HD 37836 Em* 05 35 16.6328054594 -69 40 38.439367763 9.87 10.736 10.692 10.731 10.164 B0e(q) 84 0
11 NAME Car Arm PoG 10 00 -60.0           ~ 439 1
12 HD 90177 s*b 10 22 53.8430096928 -59 37 28.363616256 9.16 9.66 8 8.15   LBV 326 0
13 * eta Car Em* 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 6.123 4.41 LBV 2438 0
14 V* AG Car WR* 10 56 11.5781414448 -60 27 12.810673260 7.00 7.57 6.96 7.73   WN11h 631 0
15 MR 35 s*b 11 08 40.0634208096 -60 42 51.721320060   12.33 10.20 11.66   LBV 125 0
16 HD 96946 * 11 08 51.7676582136 -60 45 33.909329916 7.93 8.69 8.55 9.24   O6.5III(f) 63 0
17 * zet01 Sco s*b 16 53 59.7271314888 -42 21 43.307334468 4.80 5.31 4.79 4.32 3.86 B1.5Ia+ 372 0
18 HD 160529 s*b 17 41 59.0261939376 -33 30 13.704456780 8.17 7.87 6.66 5.50 4.51 B8-A9Ia+ 195 1
19 HD 316285 s*b 17 48 14.0372119152 -28 00 53.121269592 11.88 11.27 9.60 9.28   B0Ieq 192 2
20 HD 168607 s*b 18 21 14.8856951904 -16 22 31.763755236 10.23 9.82 8.28 8.55   B9Ia+ 189 1
21 HD 168625 s*b 18 21 19.5484021368 -16 22 26.075142156 10.15 9.78 8.37 8.76   B8Ia+ 277 2
22 * 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 1176 1

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