1998A&A...337..393V


Query : 1998A&A...337..393V

1998A&A...337..393V - Astronomy and Astrophysics, volume 337, 393-402 (1998/9-2)

Light variations of massive stars (α Cyg variables). XVI. The LMC supergiants R85 (LBV) and R110 (LBV) and the SMC supergiants R42 and R45.

VAN GENDEREN A.M., STERKEN C. and DE GROOT M.

Abstract (from CDS):

Multi-colour photometry of four variable supergiants in the LMC and SMC, viz. R85, R110, R42 and R45, is searched for periods, studied and discussed. The suspected LBV R85 is undoubtedly an active LBV, though not as spectacular as R110. Their microvariations superimposed on the S Dor-activity are analyzed as well as those exhibited by R42 and R45. Often, a period search is difficult because of the very complicated micro-variability. We suggest that this is caused by an intricate multi-cyclic behaviour combined with stochastic processes. The length of the strongest cyclicity in the power spectrum of R42 (128d) is of the order of the rotation periods of BA-type supergiants. In connection with our findings described in the present paper and the previous ones, we discuss various competing theoretical models on the instability of α Cyg variables, including the LBVs.

Abstract Copyright:

Journal keyword(s): stars: variables - stars: supergiants - stars: individual: R42 = HD7099, R45 = HD7583, R85 = HDE269321, R110 = HDE269662

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10197 1
2 HD 6884 s*b 01 07 18.2182685856 -72 28 03.657105156   10.32 10.2     B9Ia0ek 119 0
3 HD 7099 s*b 01 09 03.9542485824 -72 32 17.627859960   10.89 10.9     B2.5Ia 66 0
4 HD 7583 sg* 01 13 30.5007669648 -73 20 10.319785260 10.01 10.32 10.20     A0Ia0 107 0
5 HD 10747 * 01 41 17.9039417352 -75 39 49.118705820   8.01 8.15     B2V 41 0
6 HD 33486 * 05 05 06.6627617352 -68 05 11.158005336   7.83 7.86     A0IV 47 0
7 HD 33579 sg* 05 05 55.5114721104 -67 53 10.932988848   9.32 9.13     A2Ia+ 133 0
8 HD 269321 s*b 05 17 56.0734487568 -69 16 03.809703252 10.28 10.93 10.84 10.53 10.342 B5Iae 63 0
9 HD 35293 * 05 18 02.0904677880 -68 21 19.476026604   9.45 9.25     A1mA4-A8 37 0
10 HD 35294 * 05 18 03.2564601048 -68 27 56.651008356   9.14 8.40     G1/3(IV) 21 0
11 V* S Dor sg* 05 18 14.3570612088 -69 15 01.149576912 9.08 10.39 10.25 9.74 9.14 A5Iaeq 363 0
12 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15993 1
13 HD 269662 sg* 05 30 51.4749432240 -69 02 58.590657600 10.23 10.52 10.28 10.40 10.390 A0Ia 98 0
14 HD 37722 * 05 34 43.8847063872 -69 28 18.685241004   8.97 8.91     A1V 29 0
15 HD 90177 s*b 10 22 53.8430096928 -59 37 28.363616256 9.16 9.66 8 8.15   LBV 319 0
16 V* AG Car WR* 10 56 11.5781414448 -60 27 12.810673260 7.00 7.57 6.96 7.73   WN11h 611 0

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2022.05.24-08:40:57

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