Bulletin of the Astronomical Society of India
J. C. Pandey1* and Vaibhav Pant2
1Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital 263 129, India
2Indian Institute of Technology, Guwahati, India
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We present analyses of quiescent state coronae of RS CVn-type binaries observed with XMM-Newton observatory. The quiescent state Xray luminosities in the energy band of 0.3-10.0 keV of these star were found to be 1030-32 erg s-1. Most of the stars were found to have three temperatures coronal plasma. The median value of hottest coronal temperature of these stars was found to be 2.92 keV. However, the coolest temperatures were near the 0.38 keV and 0.99 keV, respectively. The median value of global abundances of quiescent state coronae of these stars were found to be 0.14 times solar photospheric value.
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Keywords : Stars:Cool – stars:X-ray – stars:RS CVn – stars:active