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arXiv · 1009.3752

Is macroturbulence in OB Sgs related to pulsations?

S. Simón-Díaz·A. Herrero·K. Uytterhoeven·N. Castro·C. Aerts·J. Puls
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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.

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S. Simón-Díaz, A. Herrero, K. Uytterhoeven, N. Castro, C. Aerts, J. Puls. 2010-09-20. Is macroturbulence in OB Sgs related to pulsations?. https://doi.org/10.1017/s1743921311011410

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