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arXiv · 0907.4143

Soft and Supersoft X-ray Sources in Symbiotic Stars

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

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 $\sim$ 2 to 20 $\rm yr^{-1}$, and $\sim$ 2 to 17 $\rm yr^{-1}$, 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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Chunhua Zhu, Guoliang Lu, Zhaojun Wang, Jun Zhang. 2009-07-23. Soft and Supersoft X-ray Sources in Symbiotic Stars. https://doi.org/10.1016/j.newast.2009.07.002

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