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 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop..186z&link_type=abstract

XMM-Newton Proposal ID #05561401

Computer Science

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Igr J16320-4751, Xmm-Newton Proposal Id #05561401

Scientific paper

We request to monitor 4 obscured HMXB composed by a neutron star and a supergiant OB companion (IGR J16320-4751, IGR J16393-4643, IGR J16418-4532, 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 IGR J16320-4751 8 times 5 ks and IGR J16393-4643, IGR J16418-4532 and IGR J18027-2016 5 times 7 ks for a total of 145 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 the relation between the column density and the orbital period and derive the properties of the stellar wind.

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