P Cygni Features in the Chandra HETGS Spectrum of Cygnus X-3

Details P Cygni Features in the Chandra HETGS Spectrum of Cygnus X-3 P Cygni Features in the Chandra HETGS Spectrum of Cygnus X-3

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.2503l&link_type=abstract

American Astronomical Society, HEAD Meeting #5, #25.03; Bulletin of the American Astronomical Society, Vol. 32, p.1220

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The X-ray binary Cyg X-3 was observed with the Chandra High Energy Transmission Grating when the X-ray source was in a high state. We report the detection of several spectral features exhibiting P Cygni profiles, observed throughout the 4.8 hr orbital period. The absorption features have equivalent widths of a few tens of milli-Angstroms and average blueshifts corresponding to 900 km/s. The emission components of the P Cygni features are dominated by recombination in X-ray photoionized gas. Results from analyses of the spectra are discussed in the context of a model of Cyg X-3 in which a compact X-ray source irradiates a dense stellar wind from a massive Wolf-Rayet companion star.

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