A large, periodic variation in the stellar wind of theta1 Orionis C

Details A large, periodic variation in the stellar wind of theta1 Orionis C A large, periodic variation in the stellar wind of theta1 Orionis C

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...425l..29w&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 425, no. 1, p. L29-L32

Astronomy and Astrophysics

Astronomy

47

Absorption Spectra, Emission Spectra, O Stars, Stellar Spectra, Stellar Winds, Ultraviolet Astronomy, Ultraviolet Emission, Ultraviolet Spectra, Carbon, Hydrogen, Iue, Orion Nebula, Stellar Mass

Scientific paper

A period of 15.4 days, recently discovered by Stahl et al. from intensive monitoring of hydrogen alpha emission in Theta1 Ori C during 1992-1993, has been found to phase large variations in the C IV lambda lambda 1548, 1551 wind profile of this star previously reported from International Ultraviolet Explorer (IUE) high-resolution data obtained during 1978-1983. These stellar-wind variations are among the largest observed in O stars not known to be components of interacting binaries; the strict periodicity is unique among apparently single O stars and constitutes an important constraint on the unknown origin of the phenomenon.

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