Other
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.266..367i&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 266, p. 367
Other
11
X Ray Stars, Cataclysmic Variables, Emission Spectra, X Ray Spectra, Bremsstrahlung, Iron, Light Curve, Exosat Satellite
Scientific paper
Results are presented of a detailed spectral analysis of data obtained from Ginga satellite. It is found that the hard X-ray spectrum from the intermediate polar EX Hya can be interpreted by two emission components, one of which is optically thin thermal bremsstrahlung with temperature about 2 keV and the other is the well-known hard X-ray component, the spectrum of which is that of thermal bremsstrahlung with a temperature of about 11 keV. In addition, the spectrum contains an iron K-beta emission line from EX Hya, the first detection of iron K-beta emission line from a magnetized cataclysmic variable. The values of the central energies of K-alpha (6.8 keV) and K-beta (8.0 keV) and their intensities point to the origin of these lines from optically thin thermal plasma in collisional ionization equilibrium.
Ishida Manabu
Makishima Kazuo.
Masai Kuniaki
Mukai Koji
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