Resolving the iron K line in Cygnus X-2 - an observation with BBXRT

Details Resolving the iron K line in Cygnus X-2 - an observation with BBXRT Resolving the iron K line in Cygnus X-2 - an observation with BBXRT

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...410..796s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 410, no. 2, p. 796-802.

Astronomy and Astrophysics

Astrophysics

31

Accretion Disks, Astronomical Spectroscopy, Iron, X Ray Telescopes, Emission Spectra, Light Curve, Line Spectra, Spectral Line Width, Stellar Coronas

Scientific paper

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.

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