Hot subdwarfs with degenerate companions

Details Hot subdwarfs with degenerate companions Hot subdwarfs with degenerate companions

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop..182m&link_type=abstract

XMM-Newton Proposal ID #06554801

Other

Stars, White Dwarfs, Solar System, Pg 1101+249

Scientific paper

Based on evolutionary models and observational evidence, it is believed that most of the hot subdwarfs in close binary systems have white dwarf companions. The X-ray emission expected from accretion of the subdwarf's wind can confirm the presence of compact stars and be used to derive other important information on these systems that might be progenitors of Type Ia SN. This has been recently demonstrated in the case of the sdO binary HD 49798, where with XMM-Newton we have discovered a very massive white dwarf. From a large sample of hot subdwarfs that are suspected to have degenerate companions, we have selected the three most promising targets for X-ray observations.

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