Is macroturbulence in OB Sgs related to pulsations?

Details Is macroturbulence in OB Sgs related to pulsations? Is macroturbulence in OB Sgs related to pulsations?

2010-09-20

arxiv.org/abs/1009.3752v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

2 pages, 1 figure. Poster contribution to the proceedings of the IAU272 "Active OB stars: structure, evolution, mass loss and

Scientific paper

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.

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