The complex gas environment of EXO 0748-676

Details The complex gas environment of EXO 0748-676 The complex gas environment of EXO 0748-676

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hrxs.confe...9c&link_type=abstract

"High Resolution X-ray Spectroscopy: Towards IXO, Proceedings of the international workshop held at the Mullard Space Science La

Computer Science

Scientific paper

Thanks to the high energy resolution now available, the complex gaseous environment of X-ray binary systems has been revealed. Here we present the results on a large RGS data-set of EXO 0748-676, a bright dipper. We report the effects of different ionisation mechanisms: photo- and collisional- ionsation, producing both absorption and emission lines. This is the first time that a collisionally ionised gas has been detected in a X-ray binary system. We test different gas geometry and we investigate the possibility of an X-ray-circumbinary disc.

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