Resolving the Iron K Line in Cygnus X-2: an Observation with BBXRT
Abstract
The Astro-1 Space Shuttle payload's Broad Band X-ray telescope has been used to obtain high-quality, moderate-resolution spectroscopy of Cygnus X-2 which allow the resolving of the physical width of the 6.7 keV Fe K-alpha feature with a factor-of-4 energy resolution improvement over past experiments. Three possible sites are noted for the Fe K-alpha emission: the accretion disk, its corona, and the source itself. It is judged that reflection from the accretion disk can generate a line of the observed energy, width, and equivalent width, provided that the disk surface is highly ionized.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 1993
- DOI:
- 10.1086/172796
- Bibcode:
- 1993ApJ...410..796S
- Keywords:
-
- Accretion Disks;
- Astronomical Spectroscopy;
- Iron;
- X Ray Telescopes;
- Emission Spectra;
- Light Curve;
- Line Spectra;
- Spectral Line Width;
- Stellar Coronas;
- Astrophysics;
- STARS: INDIVIDUAL CONSTELLATION NAME: CYGNUS X-2;
- X-RAYS: STARS;
- STARS: BINARIES: CLOSE