Broadband spectroscopy using two Suzaku observation of the HMXB GX 301-2

Details Broadband spectroscopy using two Suzaku observation of the HMXB GX 301-2 Broadband spectroscopy using two Suzaku observation of the HMXB GX 301-2

2011-11-09

arxiv.org/abs/1111.2088v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

12 Pages, 9 Figures, accepted by ApJ

Scientific paper

We present the analysis of two Suzaku observations of GX 301-2 at two orbital phases after the periastron passage. Variations in the column density of the line-of-sight absorber are observed, consistent with accretion from a clumpy wind. In addition to a CRSF, multiple fluorescence emission lines were detected in both observations. The variations in the pulse profiles and the CRSF throughout the pulse phase have a signature of a magnetic dipole field. Using a simple dipole model we calculated the expected magnetic field values for different pulse phases and were able to extract a set of geometrical angles, loosely constraining the dipole geometry in the neutron star. From the variation of the CRSF width and energy, we found a geometrical solution for the dipole, making the inclination consistent with previously published values.

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