The fast-spinning ultra-massive white dwarf companion of HD 49798

Details The fast-spinning ultra-massive white dwarf companion of HD 49798 The fast-spinning ultra-massive white dwarf companion of HD 49798

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010xmm..prop...53m&link_type=abstract

XMM-Newton Proposal ID #06712401

Physics

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Hd 49798

Scientific paper

HD49798/RXJ0648-4418 is an X-ray binary with unique properties: the primary star is the brightest known subdwarf of early spectral type, while the secondary is the fastest rotating (P=13.2 s) and one of the most massive (M>1.2 Msun) white dwarfs currently known. We propose a follow-up study to better understand the properties of the X-ray emission and derive tighter constraints on the masses of this interesting post-common envelope binary. In addition, observations near the time of the eclipse will provide for the first time information on the stellar wind properties of a hot subdwarf.

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