A comparison of white dwarf mass estimators using the Intermediate Polar XY
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چکیده
We determine the mass of the white dwarf in the eclipsing intermediate polar XY Ari following the method given in Cropper, Ramsay & Wu using a multi-temperature bremsstrahlung model. By tting X-ray spectra from Ginga, RXTE and ASCA we nd the mean of the best ts to the data taken using diierent detectors is M wd =1.280.04 M. This gure is too high to be consistent with the mass of the white dwarf found by Hellier from X-ray eclipse timings. There are also small systematic diierences between the masses derived using diierent X-ray satellites.
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تاریخ انتشار 2007