Masaq Index
arXiv 2009-07-23 DOI 10.1016/j.newast.2009.07.002 0 views

Soft and Supersoft X-ray Sources in Symbiotic Stars

Zhu, Chunhua · Lu, Guoliang · Wang, Zhaojun · Zhang, Jun

Original · EN

Assuming that soft X-ray sources in symbiotic stars result from strong thermonuclear runaways, and supersoft X-ray sources from weak thermonuclear runaways or steady hydrogen burning symbiotic stars, we investigate the Galactic soft and supersoft X-ray sources in symbiotic stars by means of population synthesis. The Galactic occurrence rates of soft X-ray sources and supersoft X-ray sources are from 2 to 20 yr⁻¹, and 2 to 17 yr⁻¹, respectively. The numbers of X-ray sources in symbiotic stars range from 2390 to 6120. We simulate the distribution of X-ray sources over orbital periods, masses and mass-accretion rates of white dwarfs. The agreement with observations is reasonable.

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