The variable cyclotron line in GX 301-2 release_kbbxks4drrbktamymuivx4n4mi

by Ingo Kreykenbohm, Joern Wilms, Wayne Coburn, Markus Kuster, Richard E. Rothschild, William A. Heindl, Peter Kretschmar, Ruediger Staubert

Released as a article .

2004  

Abstract

We present pulse phase resolved spectra of the hypergiant high mass X-ray binary GX 301-2. We observed the source in 2001 October with RXTE continuously for a total on-source time of almost 200ksec. We model the continuum with both, a heavily absorbed partial covering model and a reflection model. In either case we find that the well known cyclotron resonant scattering feature (CRSF) at 35keV is - although present at all pulse phases - strongly variable over the pulse: the line position varies by 25% from 30keV in the fall of the secondary pulse to 38keV in the fall of the main pulse where it is deepest. The line variability implies that we are seeing regions of magnetic field strength varying between 3.4 10^12G and 4.2 10^12G.
In text/plain format

Archived Files and Locations

application/pdf  449.8 kB
file_ycc56bavonbwpk23yjtkxpavna
arxiv.org (repository)
web.archive.org (webarchive)
application/pdf  427.6 kB
file_wjmdvynegzb5bbt733lxuil554
archive.org (archive)
Read Archived PDF
Preserved and Accessible
Type  article
Stage   submitted
Date   2004-09-01
Version   v1
Language   en ?
Work Entity
access all versions, variants, and formats of this works (eg, pre-prints)
Catalog Record
Revision: 37e7e884-80d7-4dbd-a3b2-08e3b9d4dbd8
API URL: JSON