BROADBAND SPECTROSCOPY USING TWO SUZAKU OBSERVATIONS OF THE HMXB GX 301−2
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Author/Creator ORCID
Date
2012-01-09
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Citation of Original Publication
Suchy, Slawomir, Felix Fürst, Katja Pottschmidt, Isabel Caballero, Ingo Kreykenbohm, Jörn Wilms, Alex Markowitz, and Richard E. Rothschild. “BROADBAND SPECTROSCOPY USING TWO SUZAKU OBSERVATIONS OF THE HMXB GX 301−2.” The Astrophysical Journal 745, no. 2 (January 2012): 124. https://doi.org/10.1088/0004-637X/745/2/124.
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Abstract
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 cyclotron resonance scattering feature (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.