Probing the Boundary Layer of Dwarf Novae Above the Period Gap

Details Probing the Boundary Layer of Dwarf Novae Above the Period Gap Probing the Boundary Layer of Dwarf Novae Above the Period Gap

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop...63g&link_type=abstract

XMM-Newton Proposal ID #05519202

Physics

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Ru Peg, Ss Aur, Xmm-Newton Proposal Id #05519202

Scientific paper

We propose to obtain XMM-Newton observations of two dwarf novae above the period gap, to probe and characterize the structure and nature of their boundary layers. In particular RU Peg contains the hottest WD in a DN, and SS Aur has a near Chandrasekhar mass WD, and both are at very low inclination and have excellent parallax distances. The Spectra will allow us to characterize the type of X-ray spectra exhibited by the systems, temperatures and densitites in the BLs and to map out the velocity structure of the BL by using the line widths of X-ray lines formed at different temperatures to examine wind outflow versus high rotational velocity of the BL and the extent to which X-ray BL is decelerated from the Keplerian motion of the inner disk (5,000km/s for these 2 massive WDs).

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