XMM-Newton Proposal 03021604

Details XMM-Newton Proposal 03021604 XMM-Newton Proposal 03021604

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004xmm..prop...75r&link_type=abstract

XMM-Newton Proposal ID #03021604

Other

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Ce 315, Sdss J1240-01, Xmm-Newton Proposal 03021604

Scientific paper

We have an on-going project to survey the ultra-compact AM CVn systems using XMM-Newton. These accreting binaries have periods less than ~70 min and are hydrogen deficient. They are important astrophysically because they are expected to be strong sources of gravitational radiation in the peak sensitivity band of LISA. XMM-Newton has so far observed 7 of the 13 AM CVn systems, but this is biased towards shorter period systems. We propose to observe another 4 systems to give us a comprehensive sample of these objects. In particular, we will determine the element abundance from their X-ray spectra and characterise the X-ray and UV variability as a function of orbital period. This is essential for our understanding of their evolutionaryhistory and their energy balance.

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