X-rays from RS Canum Venaticorum systems - A HEAO 1 survey and the development of a coronal model

Astronomy and Astrophysics – Astrophysics

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Binary Stars, Stellar Atmospheres, Stellar Coronas, X Ray Stars, Astronomical Catalogs, Atmospheric Models, Heao 1, Stellar Spectra

Scientific paper

The paper presents HEAO 1 low-energy X-ray observations of 59 known or suspected RS CVn systems cited in the lists of Hall (1976), Eggen (1978), and the circulars of the Working Group on RS CVn systems of IAU Commission 42. The data are used to argue against the validity of the minimum flux coronal models. A coronal loop model is used to derive expressions for the loop parameters in terms of observable quantities, and find acceptable solutions for RS CVn systems. It is concluded that the difference between solar activity and that observed in RS CVn systems may be merely a matter of scale.

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