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Astron. Astrophys. 318, 791-796 (1997)

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ROSAT observations of the RSCVn binary o Geminorum

Z. Yi 1, O. Elgaroy 1, O. Engvold 1 and N.J. Westergaard 2

1 Institute of Theoretical Astrophysics, Oslo, Norway
2 Danish Space Research Institute, Lyngby, Denmark

Received 22 December 1995 / Accepted 2 March 1996

Abstract

X-ray observations of the RSCVn system [FORMULA] Geminorum have been undertaken with the ROSAT observatory. Several spectra of very good signal-to-noise ratio were obtained. Spectral fitting using metal abundances amounting to 50% of solar values reveal two temperature components at 2 MK and 12 MK. Previous EXOSAT observations showed another component at 40 MK. Particular interest is focused on the temporal variations of the X-ray emission. It is found that variations occur on time scales ranging from years to hours and minutes.

Key words: stars: coronae – X-rays: stars – stars oe Gem

Send offprint requests to: O. Elgaroy

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© European Southern Observatory (ESO) 1997

Online publication: July 3, 1998
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