Open AccessCataclysmic Variables — X-rays and Optical Activity in V1223 Sgr and V709 Cas
Author(s) -
R. Gális,
L. Hric,
E. Kundra,
F. Münz
Publication year - 2011
Publication title -
acta polytechnica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.207
H-Index - 15
eISSN - 1805-2363
pISSN - 1210-2709
DOI - 10.14311/1464
Subject(s) - astrophysics , physics , polar , population , x ray , ridge , intermediate polar , astronomy , white dwarf , geology , stars , optics , paleontology , demography , sociology
Intermediate polars are a major fraction of all cataclysmic variables detected by INTEGRAL in hard X-ray. These objects have recently been proposed to be the dominant X-ray source population detected near the Galactic centre, and they also contribute significantly to X-ray diffuse Galactic ridge emission. Nevertheless, only 25% of all known intermediate polars have been detected in hard X-ray. This fact can be related to the activity state of these close interacting binaries.A multi-frequency (from optical to X-ray) investigation of intermediate polars is essential for understanding the physical mechanisms responsible for the observed activity of these objects.