XMM-Newton Proposal 03018303

Details XMM-Newton Proposal 03018303 XMM-Newton Proposal 03018303

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004xmm..prop...60p&link_type=abstract

XMM-Newton Proposal ID #03018303

Physics

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Rx1050-14, Gd552, Xmm-Newton Proposal 03018303

Scientific paper

Angular momentum loss grinds cataclysmic variables down to very short period on relatively short timescales (1-3 Gyr); then they should "bounce" at Porb~80 min and begin evolving back to longer period. Since the Galaxy is 10 Gyr old, these "period bouncers" should now be extremely numerous. Unfortunately, none have yet been securely identified. We believe we have finally identified a few of these stars (5), based on their very low mass ratios. These stars are a newly recognized class of CV, and 1-10 keV X-rays appear to be a major part (about half) of their accretion luminosity budget. XMM observations would clarify the origin of the X-rays and probe physical conditions in the accreting gas, donated by a star which has been stripped down to 0.02-0.04 solar masses.

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