The unique system HD49798-RXJ0648 a post spiral-in and common-envelope binary

Details The unique system HD49798-RXJ0648 a post spiral-in and common-envelope binary The unique system HD49798-RXJ0648 a post spiral-in and common-envelope binary

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop..165t&link_type=abstract

XMM-Newton Proposal ID #05554601

Other

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Hd 49798, Xmm-Newton Proposal Id #05554601

Scientific paper

HD49798-RXJ0648 is a unique spectroscopic binary containing a 13 s X-ray pulsating star accreting from an early type sub-dwarf. Although predicted by evolutionary models of common envelope spiral-in, no other system of this kind is currently known. The next important step, objective of this proposal, is to determine if the compact star is a neutron star or, as it seems more likely, a white dwarf. In the latter case the 13 s spin period would be the shortest known for a white dwarf, implying a large accreted mass and making this system the white dwarf analogous of LMXRBs containing millisecond pulsars.

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