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1996A&AS..116....9S - Astron. Astrophys., Suppl. Ser., 116, 9-14 (1996/April-1)
A pulsating star inside η Carinae. II. The variability of the pulsation period.
STERKEN C., DE GROOT M.J.H. and VAN GENDEREN A.M.
Abstract (from CDS):
On the basis of photometric observations published since 1974, we present new times of maximum light of the LBV η Car, and discuss the variation of the pulsation period. It is shown that -over more than two decades- the pulsation period is stable at 58.d58 with a mean error of about half an hour. η Car is the first LBV for which such a stable pulsation period can be recognised. In addition, we present evidence for the possible presence of a secondary period which beats with the main period on a time scale of the order of 20 years.
Abstract Copyright: ∼
Journal keyword(s): stars: individual: eta Car - stars: variables - stars: oscillations - stars: supergiants
Simbad objects: 2
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