Is macroturbulence in OB Sgs related to pulsations?
Abstract
As part of a long term observational project, we are investigating the macroturbulent broadening in O and B supergiants (Sgs) and its possible connection with spectroscopic variability phenomena and stellar oscillations. We present the first results of our project, namely firm observational evidence for a strong correlation between the extra broadening and photospheric line-profile variations in a sample of 13 Sgs with spectral types ranging from O9.5 to B8.
- Publication:
-
Active OB Stars: Structure, Evolution, Mass Loss, and Critical Limits
- Pub Date:
- July 2011
- DOI:
- 10.1017/S1743921311011410
- arXiv:
- arXiv:1009.3752
- Bibcode:
- 2011IAUS..272..549S
- Keywords:
-
- stars: early-type;
- stars: atmospheres;
- stars: oscillations;
- stars: rotation;
- supergiants;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 2 pages, 1 figure. Poster contribution to the proceedings of the IAU272 "Active OB stars: structure, evolution, mass loss and critical limits"