Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009coast.158..288m&link_type=abstract
"Communications in Asteroseismology, Vol.158, p. 288 Proceedings of "38th Liege International Astrophysical Colloquium: Evoluti
Astronomy and Astrophysics
Astrophysics
2
Scientific paper
Recent determinations of element abundances in early-B stars have shown a significant discrepancy with those derived for the Sun. β Cep pulsators are early-B stars whose pulsations are driven by the opacity mechanism operating at the Fe-group opacity bump (e.g. Dziembowski & Pamyatnykh 1993). Since each element contributes differently to the stellar opacity in the Z-bump region, differences in the metal mixture may affect the pulsation properties of these early-B stars. Here we study the role of different elements in the stellar opacity of B-type stars, and the
consequences of the uncertainties in the composition of the metal mixture for the instability strip of β~Cep stars.
Miglio Andrea
Montalban Josefina
Morel Th.
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