X-ray Illumination in Low-Mass X-ray Binaries

Details X-ray Illumination in Low-Mass X-ray Binaries X-ray Illumination in Low-Mass X-ray Binaries

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.320d&link_type=abstract

Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:

Astronomy and Astrophysics

Astrophysics

Scientific paper

We calculate self-consistent models of X-ray irradiated accretion discs in close binary systems. We show that a point-like X-ray source powered by accretion and located in the disc plane cannot modify the disc structure, mainly because of the self-screening by the disc of its outer regions. Since observations show that the emission of the outer disc regions in low mass X-ray binaries is dominated by the reprocessed X-ray flux, disks in these systems must be illuminated by some processes as yet misunderstood. Using an adequate representation of the irradiation flux, we analyse the thermal-viscous stability of irradiated accretion discs and derive the stability criteria of such systems. Finally we study the effects of irradiation on the outburst cycles and decay lightcurves of soft X-ray transients.

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