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

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

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1273..269m&link_type=abstract

17TH EUROPEAN WHITE DWARF WORKSHOP. AIP Conference Proceedings, Volume 1273, pp. 269-274 (2010).

Computer Science

White Dwarfs, X-Ray Binary Stars, Pulsars, Supernovae, Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae, X-Ray Binaries, Pulsars, Supernovae

Scientific paper

We discuss the properties of HD49798/RXJ0648.0-4418 the only known X-ray binary composed by a hot sub-dwarf and an X-ray pulsar. We recently found evidence that the pulsations are due to a very massive (1.28 Msolar), fast rotating (13 s) white dwarf. The future evolution of this post common envelope binary will involve a new phase of mass accretion through Roche-lobe overflow that could drive the white dwarf above the Chandrasekhar limit and produce a Type Ia supernova explosion or a millisecond pulsar.

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