METU Department of Physics, Ankara
02 November 2017, Thursday, 14:40
Cavid Erginsoy Seminar Room, Physics Department, 3rd floor
Abstract: Cataclysmic Variables (CVs), compact binaries with white dwarf (WD) primaries, constitute laboratories to study accretion flows, gas dynamics, outflows, transient outbursts, and explosive nuclear burning under a variety of astrophysical plasma conditions. CVs, together with related accreting WD binaries, have been studied over decades and are important for population studies of galactic X-ray sources. However, recent space- and ground-based high resolution spectral and timing studies, along with recent surveys indicate that we still have observational and theoretical complexities yet to answer. I will review briefly evolutionary aspects and concentrate on diversity of dwarf nova outburst, the nova-like systems and the optically thick-thin disk transition conditions, and the the disk wind models. I will point out how accretion phase shapes the thermonuclear eruptions on the surface of WD binaries and Nova evolution. Also, I will discuss how flickering variability studies from optical to X-rays can be probes to determine accretion history and indicate the connection of time and spectral variability of CVs with LMXBs and AGNs.