Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004xmm..prop..119k&link_type=abstract
XMM-Newton Proposal ID #03032201
Astronomy and Astrophysics
Astrophysics
White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Aql X-1, Xmm-Newton Proposal 03032201
Scientific paper
Understanding the physics of the accretion flows around and onto compact object is a key goal of X-ray astrophysics. We propose to use XMM-Newton to obtain detailed X-ray spectra during the onset of an outburst of the soft X-ray transient Aql X-1. Exploiting regular and frequent optical monitoring of Aql X-1 already being carried out by members of our group, it will be possible to observe the onset of an outburst with XMM-Newton. This will provide direct tests of the disk instability model commonly used to describe the behavior of soft X-ray transients and will give new insights into the physics of the accretion flow.
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