Does the Fe K line evolve around the color-color diagram of neutron star GX17+2?

Details Does the Fe K line evolve around the color-color diagram of neutron star GX17+2? Does the Fe K line evolve around the color-color diagram of neutron star GX17+2?

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop..141c&link_type=abstract

XMM-Newton Proposal ID #06539101

Computer Science

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Gx 17+2

Scientific paper

The X-ray spectra of neutron star LMXBs vary frequently, tracing out characteristic Z or atoll tracks on color-color diagrams. However, the driving force behind this variability remains unclear. The recent discovery of broad, relativistic Fe K emission lines in these systems may finally provide the key to unlocking this secret. The asymmetric line profile observed is characteristic of emission from the inner disk around a compact object, where extreme Doppler shifts and gravitational redshifts are at play. Thus, the Fe K line acts as a useful tool to track the extent of the inner disk. With four, 30 ks XMM-Newton observations of neutron star LMXB GX 17+2, we will follow the evolution of the inner disk around the color-color diagram, testing how, and if, the inner accretion flow changes.

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