Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...376..266b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 376, July 20, 1991, p. 266-271.
Astronomy and Astrophysics
Astrophysics
77
Astronomical Spectroscopy, Binary Stars, O Stars, Stellar Spectra, Ultraviolet Spectra, Analytic Functions, Iue, Line Spectra, Spectrum Analysis, Tomography
Scientific paper
The UV photospheric lines of the short-period, double-lined O-star spectroscopic binary AO Cas are analyzed. Archival data from IUE (16 spectra uniformly distributed in orbital phase) were analyzed with a tomography algorithm to produce the separate spectra of the two stars in six spectral regions. The spectral classifications of the primary and secondary, O9.5 III and O8 V, respectively, were estimated through a comparison of UV line ratios with those in spectral standard stars. An intensity ratio of 0.5-0.7 (primary brighter) at 1600 A is compatible with the data.
Bagnuolo William G. Jr.
Gies Douglas R.
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