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.
@article{arxiv.1009.3752,
title = {Is macroturbulence in OB Sgs related to pulsations?},
author = {S. Simón-Díaz and A. Herrero and K. Uytterhoeven and N. Castro and C. Aerts and J. Puls},
journal= {arXiv preprint arXiv:1009.3752},
year = {2015}
}
Comments
2 pages, 1 figure. Poster contribution to the proceedings of the IAU272 "Active OB stars: structure, evolution, mass loss and critical limits"