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A spectroscopic search for colliding stellar winds in O-type close binary systems. IV - Iota OrionisWe 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.
Document ID
19930040659
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Gies, Douglas R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wiggs, Michael S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bagnuolo, William G., Jr.
(Georgia State Univ. Atlanta, United States)
Date Acquired
August 16, 2013
Publication Date
February 1, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 403
Issue: 2
ISSN: 0004-637X
Subject Category
Astrophysics
Funding Number(s)
CONTRACT_GRANT: NAG5-1994
CONTRACT_GRANT: NAG5-1218
Distribution Limits
Public
Copyright
Other
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