Mkrtichian, D. E. ; Lehmann, H. ; Rodríguez, E. ; Olson, E. ; Kim, S.-L. ; Kusakin, A. V. ; Lee, J. W. ; Youn, J.-H. ; Kwon, S.-G. ; López-González, M. J. ; Janiashvili, E. ; Tiwari, S. K. ; Joshi, Santosh ; Lampens, P. ; Van Cauteren, P. ; Glazunova, L. ; Gamarova, A. ; Grankin, K. N. ; Rovithis-Livaniou, E. ; Svoboda, P. ; Uhlar, R. ; Tsymbal, V. ; Kokumbaeva, R. ; Urushadze, T. ; Kuratov, K. ; Shin, H.-C. ; Kang, Y.-W. ; Soonthornthum, B.

published in Monthly Notices of the Royal Astronomical Society, 475 issue 4, pp. 4745-4767 (2018)

Abstract: We analysed photometric time series of the active, semi-detached 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.

Keyword(s): binaries: eclipsing ; stars: oscillations
DOI: 10.1093/mnras/stx2841