Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...403..752g&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 403, no. 2, p. 752-759.
Astronomy and Astrophysics
Astrophysics
12
Astronomical Spectroscopy, Binary Stars, Giant Stars, O Stars, Stellar Winds, H Alpha Line, Iue, Line Spectra, Stellar Orbits, Stellar Spectra, Ultraviolet Radiation
Scientific paper
We present H-alpha and He I 6678 A line profiles for the eccentric orbit binary Iota Ori. We have applied a tomography algorithm which uses the established orbital velocity curves and intensity ratio to reconstruct the spectral line profiles for each star. The He I profiles appear as pure photospheric lines, and H-alpha shows variable emission in the line core throughout the orbit (which is typical of O giants) and in the blue wing near periastron passage. We show that the blue wing emission is consistent with an origin between the stars which probably results from a dramatic focusing of the primary's stellar wind at periastron. We also present IUE archival spectra of the UV wind lines N V 1240 A and C IV 1550 A.
Bagnuolo William G. Jr.
Gies Douglas R.
Wiggs Michael S.
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