A comparison of white dwarf mass estimators using the intermediate polar XY Ari

Details A comparison of white dwarf mass estimators using the intermediate polar XY Ari A comparison of white dwarf mass estimators using the intermediate polar XY Ari

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.297.1269r&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 297, Issue 4, pp. 1269-1273.

Astronomy and Astrophysics

Astronomy

13

Accretion, Accretion Discs, Stars: Individual: Xy Ari, Novae, Cataclysmic Variables, White Dwarfs, X-Rays: Stars

Scientific paper

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 multitemperature bremsstrahlung model. By fitting X-ray spectra from GingaRXTE and ASCA we find that the mean of the best fits to the data taken using different detectors is M_wd=1.28+/-0.04Msolar. This figure 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 differences between the masses derived using different X-ray satellites.

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