Unveiling the mystery of supergiant fast x-ray transients

Details Unveiling the mystery of supergiant fast x-ray transients Unveiling the mystery of supergiant fast x-ray transients

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop..128b&link_type=abstract

XMM-Newton Proposal ID #06048203

Computer Science

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Saxj1818.6-1703, Axj1841.0-0536

Scientific paper

Supergiant Fast X-ray Transients (SFXT) are very variable high mass X-ray binaries in our galaxy. Two models have been proposed to interpret their behavior: (i)a gating mechanism, involving either the centrifugal barrier or ultramagnetic neutron stars (magnetars); (ii)an extermely clumpy wind from the supergiant companion. Here we propose to study the quiescent emission of three SFXTs. By making a comparison between their quiescence and outburst spectra and searching for pulsations and column density variations, we will test the applicability of the above models. These sources might well provide the very first opportunity to detect and study magnetars in binary systems. In any case, very crucial information will be obtained to test the prediction of modern theories of radiatively-driven winds.

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