Probing the Circumstellar Material in GX 301-2

Details Probing the Circumstellar Material in GX 301-2 Probing the Circumstellar Material in GX 301-2

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..818s&link_type=abstract

Chandra Proposal ID #03400827

Astronomy and Astrophysics

Astronomy

Chandra Proposal Id #03400827

Scientific paper

We propose to obtain high-resolution spectroscopic data of the high-mass X-ray binary GX 301-2/Wray977 to study the geometry of circumstellar material in the system. The observation consists of two exposures -- pre-periastron (PP) and near-apastron (NA) flares -- during which the source brightens by as much an order of magnitude compared to the normal quiescent state. The emission line spectrum, especially in the iron K region, changes dramatically during these flares, and a detailed spectral analysis will allow us to probe the distribution of material in the system, as well as the dynamical properties of the stellar wind. Measurements of the Fe K fluorescent line profile will also unambiguously distinguish the broadening mechanism, which has been difficult with low-resolution spectra.

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