The Nature of the Soft Component in the Symbiotic Star CH Cygni

Details The Nature of the Soft Component in the Symbiotic Star CH Cygni The Nature of the Soft Component in the Symbiotic Star CH Cygni

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cxo..prop.2784m&link_type=abstract

Chandra proposal ID #11300122

Computer Science

Scientific paper

The symbiotic star CH Cyg consists of an M giant and a white dwarf, and displays a two-component X-ray spectrum. The absorbed hard X-ray component is likely due to accretion onto the white dwarf. The unabsorbed soft X-ray component is thought to be either due to colliding winds or due to photoionization of the M giant wind by the hard component. We propose to obtain a high signal-to-noise grating spectrum of CH Cyg to resolve the origin of its soft component. Once we know its origin, we can begin to probe the environment around the white dwarf using the detailed spectral shape of the soft component. We propose this as a slow TOO, to be triggered when we know that CH Cyg is X-ray bright. This is a continuation of a TOO proposal accepted in Cycle 10.

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