A COMPARISON OF WHITE-DWARF MASS ESTIMATORS USING THE INTERMEDIATE POLAR XY ARI

Authors
RAMSAY G CROPPER M HELLIER C WU KW
Citation
G. Ramsay et al., A COMPARISON OF WHITE-DWARF MASS ESTIMATORS USING THE INTERMEDIATE POLAR XY ARI, Monthly Notices of the Royal Astronomical Society, 297(4), 1998, pp. 1269-1273
Citations number
14
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Monthly Notices of the Royal Astronomical Society → ACNP
ISSN journal
00358711
Volume
297
Issue
4
Year of publication
1998
Pages
1269 - 1273
Database
ISI
SICI code
0035-8711(1998)297:4<1269:ACOWME>2.0.ZU;2-7
Abstract
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 fro m Ginga, RXTE and ASCA we find that the mean of the best fits to the d ata taken using different detectors is M-wd = 1.28 +/- 0.04 M.. This f igure is too high to be consistent with the mass of the white dwarf fo und by Hellier from X-ray eclipse timings. There are also small system atic differences between the masses derived using different X-ray sate llites.