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?)

Details 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?) 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?)

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...349..537v&link_type=abstract

Astronomy and Astrophysics, v.349, p.537-545 (1999)

Astronomy and Astrophysics

Astrophysics

8

Stars: Individual: R 116 = Hde 269700, R 74 = Hde 268939, R 78 = Hde 269050, R 84 = Hde 269227, S 22 = Hd 34664, Galaxies: Magellanic Clouds

Scientific paper

Multi-colour photometry (Walraven system) of five super- and hypergiants in the LMC, viz. R 74, R 78, HD 34664, R 84 and R 116, 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. R 74 and HD 34664 are weak-active LBVs with superimposed microvariations. HD 34664 is the second known B[e] star which is also an LBV. The first reported one is R 4 in the SMC. This could alter some views on the evolutionary history of B[e] stars and LBVs. R 78 is an alpha Cyg variable, but presumably no LBV. R 116 appears to be a close counterpart of the galactic ex-/dormant LBV zeta (1) Sco, also showing an intricate alpha Cyg-type multi-period microvariability. Based on observations obtained at the European Southern Observatory at La Silla, Chile}

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