Bibcode
Aerts, C.; Puls, J.; Godart, M.; Dupret, M.-A.
Referencia bibliográfica
"Communications in Asteroseismology, Vol.158, p. 66 Proceedings of "38th Liege International Astrophysical Colloquium: Evolution and Pulsation of Massive Stars on the Main Sequence and Close to it", held on July 7-11 2008, edited by Arlette Noels, Conny Aerts, Josefina Montalban, Andrea Miglio and Maryline Briquet."
Advertised on:
7
2009
Número de citas
10
Número de citas referidas
9
Descripción
Since the use of high-resolution high signal-to-noise spectroscopy in
the study of massive stars, it became clear that an ad-hoc velocity
field at the stellar surface, termed macroturbulence, is needed to bring
the observed shape of spectral lines into agreement with observations.
We seek a physical explanation of this unknown broadening mechanism. We
interprete the missing line broadening in terms of collective
pulsational velocity broadening due to non-radial gravity-mode
oscillations. We also point out that the rotational velocity can be
seriously underestimated whenever the line profiles are fitted assuming
a Gaussian macroturbulent velocity rather than an appropriate
pulsational velocity expression.