A Large, Periodic Variation in the Stellar Wind of theta 1 Orionis C
Abstract
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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- April 1994
- DOI:
- 10.1086/187303
- Bibcode:
- 1994ApJ...425L..29W
- Keywords:
-
- Absorption Spectra;
- Emission Spectra;
- O Stars;
- Stellar Spectra;
- Stellar Winds;
- Ultraviolet Astronomy;
- Ultraviolet Emission;
- Ultraviolet Spectra;
- Carbon;
- Hydrogen;
- Iue;
- Orion Nebula;
- Stellar Mass;
- Astronomy