Soft and Supersoft X-ray Sources in Symbiotic Stars

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 populati...

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Bibliographic Details
Published in:arXiv.org 2009-07
Main Authors: Zhu, Chunhua, Lu, Guoliang, Wang, Zhaojun, Zhang, Jun
Format: Article
Language:English
Subjects:
Deposition
Orbits
Plasma
Soft x rays
Symbiotic stars
White dwarf stars
X ray sources
X-ray astronomy
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.0907.4143