41 research outputs found
Is macroturbulence in OB Sgs related to pulsations?
Full text linkAs 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.Comment: 2 pages, 1 figure. Poster contribution to the proceedings of the
IAU272 "Active OB stars: structure, evolution, mass loss and critical limits
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