Monitoring the hydrogenic column density in obscured HMXB

Details Monitoring the hydrogenic column density in obscured HMXB Monitoring the hydrogenic column density in obscured HMXB

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop..119z&link_type=abstract

XMM-Newton Proposal ID #06045202

Computer Science

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Igr J16393-4643

Scientific paper

We request to monitor 3 obscured HMXB composed by a neutron star and a supergiant OB companion (IGR J16418-4532, IGR J16393-4643 and IGR J18027-2016 in order of preference) in order to study their spectral evolution along their orbital period, particularly the hydrogenic column density. We plan to observe the 3 sources 5 times 7 ks (10 ks for IGR J16418-4532) for a total of 120 ks. Because of the strong interaction between the supergiant wind and the X-ray radiation of the accreted material, these sources are ideal laboratories to study 1) the relation between the column density, the soft excess and the orbital period, and 2) derive the properties of the stellar wind and the geometry of the system.

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