The eclipsing binary star RZ Cas: accretion-driven variability of the multimode oscillation spectrum

04-2018

Mkrtichian, D. E.; Lehmann, H.; Rodríguez, E.; ... ; Lampens, P.; Van Cauteren, P.; et al.

Abstract :

We analysed photometric time series of the active, semidetached Algol-type system RZ Cas obtained in 1999-2009, in order to search for seasonal and short-term variations in the oscillation spectrum of RZ Cas A. The orbital period shows ±1 s cyclic variations on time-scales of 6-9 years. We detected six low-degree p-mode oscillations with periods between 22.3 and 26.22 min and obtained safe mode identifications using the periodic spatial filter method. The amplitudes and frequencies of all modes vary.

Publication : Monthly Notices of the Royal Astronomical Society, Volume 475, Issue 4, p.4745-4767
DOI : 10.1093/mnras/stx2841
Bibcode : 2018MNRAS.475.4745M
Keywords : binaries: eclipsing; stars: oscillations

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