Abstract
We find that the hard X-ray spectrum from the intermediate polar EX Hya, observed with Ginga, can be interpreted by two emission components. One of these is optically thin thermal bremsstrahlung with temperature ∼2 kev, which is separate from the well-known hard X-ray component, the spectrum of which is that of thermal bremsstrahlung with a temperature ∼11 keV. We have also detected the iron Kβ emission line from EX Hya. This is the first detection of the iron Kβ emission line from a magnetized cataclysmic variable. Central energies of the Kα and the Kβ emission lines (6.8 and 8.0 keV, respectively) and their intensities indicate that they originate from optically thin thermal plasma in collisional ionization equilibrium
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