Light variations of massive stars (alpha Cygni variables) - XVII. The LMC supergiants R 74 (LBV), R 78, HD 34664=S 22 (B[e]/LBV), R 84 and R 116 (LBV?) | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

6579983

Reference Type

Journal Article

Title

Light variations of massive stars (alpha Cygni variables) - XVII. The LMC supergiants R 74 (LBV), R 78, HD 34664=S 22 (B[e]/LBV), R 84 and R 116 (LBV?)

Author(s)

van Genderen, AM; Sterken, C

Year

1999

Is Peer Reviewed?

Yes

Journal

Astronomy & Astrophysics
ISSN: 0004-6361

Publisher

EDP SCIENCES S A

Location

LES ULIS CEDEX A

Volume

349

Issue

Page Numbers

537-545

Web of Science Id

WOS:000082853700028

Abstract

Multi-colour photometry (Walraven system) of five super- and hypergiants in the LMC, viz. R 74, R 78, HD 34664, R83 and R116, is searched for variability and periods, and discussed. Apart from R 84, of which the claimed variability in the past must be due to a number of faint field stars at the edge of the apertures;, all are variable.R74 and HD 34664 are weak-active LBVs with superimposed microvariations. I-ID 34664 is the second known B[e] star which is also tin LBV. The first reported one is R4 in the SMC. This could alter some views on the evolutionary history of B[e] stars and LBVs.R78 is an a Cyg variable, bur presumably no LBV. R116 appears to be a close counterpart of the galactic ex-/dormant LBV zeta(1) Sco, also showing an intricate a Cyg-type multi-period microvariability.

Keywords

stars : individual : R 116=HDE 269700; R 74=HDE 268939; R 78=HDE 269050; R 84=HDE 269227; S22=HD34664-galaxies : magellanic clouds