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

Abstract

DEM acknowledges his work as part of the research activity supported by the National Astronomical Research Institute of Thailand (NARIT), Ministry of Science and Technology of Thailand. HL acknowledges support by the DFGgrant LE 1102/3-1. ER and MGLJ acknowledge support MINECO/Spain projects AYA2014-54348-C3-1-R, ESP2014-54362-P and ESP2015-65712-C5-5-R. VT acknowledges support from RFBR grant no. 15-52-12371. SJ acknowledge the grant received from Indo-South Africa Science and Technology Cooperation INT/SAFR/P-3(3)2009) and NRF grant UID69828 funded by Departments of Science and Technology of the Indian and South African Governments under which the photometric observations were carried out from ARIES. KA, RK acknowledge their work as a research activity in the framework of Project No. 0075/GF4 'Investigation of the Variability of Stars and the Processes of Substance Exchange With a Gas-Dust Disk' DEM thanks E. Soydugan for providing her 2002 observations of RZ Cas for re-analysis. MDE thanks amateur astronomer Kari Tikkanen (Oulu University) for providing us, when we were searching for evidences of orbital period jump, his visual observations, which safely showed the orbital period jump in RZ Cas in the years 2000-2001.