The changing photoionized plasma in the bright Low-Mass X-ray binary GX 13+1

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White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Gx13+1, Gx13+1, Gx13+1, Gx13+1, Gx13+1, Xmm-Newton Proposal 05054805

Scientific paper

We propose five 10 ks XMM-Newton observations of GX13+1, the brightest low-mass X-ray binary (LMXB) which exhibits strong X-ray absorption features. Such features have been observed in a number of LMXBs and are identified with ions such as Fe XXV and Fe XXVI. GX13+1 is the best source to study the variations in the lines with the intensity of the source due to its both high and strongly variable luminosity. We will test whether the absorption lines detected in GX13+1 by XMM-Newton and Chandra are consistent with the presence of a highly-ionized absorber located around the accretion disk, similar to other LMXBs and study the changes of such absorber. This reveals dynamics of the disk wind, which commonly exists in high luminosity accretion-disk systems as galactic binaries and AGNs.

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