SIMBAD references

2006AJ....131..633G - Astron. J., 131, 633-637 (2006/January-0)

A ROSAT survey of contact binary stars.


Abstract (from CDS):

Contact binary stars are common variable stars that are all believed to emit relatively large fluxes of X-rays. In this work we combine a large new sample of contact binary stars derived from the ROTSE-I telescope with X-ray data from the ROSAT All Sky Survey (RASS) to estimate the X-ray volume emissivity of contact binary stars in the Galaxy. We obtained X-ray fluxes for 140 contact binaries from the RASS, as well as two additional stars observed by the XMM-Newton observatory. From these data we confirm the emission of X-rays from all contact binary systems, with typical luminosities of approximately 1.0x1030 ergs/s. Combining calculated luminosities with an estimated contact binary space density, we find that contact binaries do not have strong enough X-ray emission to account for a significant portion of the Galactic X-ray background.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Close - Stars: Binaries: Eclipsing - Stars: Activity - Stars: Variables: Other - X-Rays: Stars

VizieR on-line data: <Available at CDS (J/AJ/131/633): table1.dat>

Simbad objects: 142

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