Computer Science
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010xmm..prop..214s&link_type=abstract
XMM-Newton Proposal ID #06752305
Computer Science
White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Css081231, Sdssj0328, Denij1730, Sdssj1333
Scientific paper
The defining criterion of polars (AM Herculis stars) was their prominent soft X-ray emission, which led to numerous discoveries with the EINSTEIN, EXOSAT, ROSAT and EUVE satellites. XMM-Newton observations of those X-ray selected polars and genuine discoveries of new polar systems reveal growing evidence that the prevailence or even the existence of a soft X-ray component may be rather the exception than the rule. In the last decade polars were discovered in optical surveys like the SDSS and the CSS. Here we propose XMM-Newton observations of 5 optically selected polars to search for soft X-ray spectral components, answer the question why they escaped detection in past X-ray surveys and shed new light on the intrinsic energy distribution of polars.
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