Contact Binary Variables as X-ray Sources

W. P. Chen; Kaushar Sanchawala; M. C. Chiou

doi:10.1086/499206

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arXiv · astro-ph/0508632

Contact Binary Variables as X-ray Sources

W. P. Chen·Kaushar Sanchawala·M. C. Chiou

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Abstract

We present cross-identification of archived X-ray point sources with W UMa variable stars found in the All-Sky Automated Survey (ASAS). In a surveyed sky area of 300 square degrees of ASAS, 36 W UMa stars have been found associated with X-ray emission. We compute the distances of these W UMa systems and hence their X-ray luminosities. Our data support the "supersaturation" phenomenon seen in these fast rotators, namely that the faster a W UMa star rotates, the weaker its X-ray luminosity.

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W. P. Chen, Kaushar Sanchawala, M. C. Chiou. 2005-08-30. Contact Binary Variables as X-ray Sources. https://doi.org/10.1086/499206

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