An Apparent Hard X-ray Decline of CH Cygni

Details An Apparent Hard X-ray Decline of CH Cygni An Apparent Hard X-ray Decline of CH Cygni

2006-09-08

arxiv.org/abs/astro-ph/0609245v1

Astronomy and Astrophysics

Astrophysics

8 pages, 4 figures, accepted by Publications of the Astronomical Society of Japan

Scientific paper

CH Cygni is a symbiotic star consisting of an M giant and an accreting white dwarf, which is known to be a highly variable X-ray source with a complex, two-component, spectra. Here we report on two Suzaku observations of CH Cyg, taken in 2006 January and May, during which the system was seen to be in a soft X-ray bright, hard X-ray faint state. Based on the extraordinary strength of the 6.4 keV fluorescent Fe K-alpha line, we show that the hard X-rays observed with Suzaku are dominated by scattering.

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