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2015A&A...580L...9W - Astronomy and Astrophysics, volume 580L9-9 (2015/8-1)
Wider pulsation instability regions for β Cephei and SPB stars calculated using new Los Alamos opacities.
WALCZAK P., FONTES C.J., COLGAN J., KILCREASE D.P. and GUZIK J.A.
Abstract (from CDS):
Our goal is to test the newly developed OPLIB opacity tables from Los Alamos National Laboratory and check their influence on the pulsation properties of B-type stars. We calculated models using MESA and Dziembowski codes for stellar evolution and linear, nonadiabatic pulsations, respectively. We derived the instability domains of β Cephei and SPB-types for different opacity tables OPLIB, OP, and OPAL. The new OPLIB opacities have the highest Rosseland mean opacity coefficient near the so-called Z-bump. Therefore, the OPLIB instability domains are wider than in the case of OP and OPAL data.
Abstract Copyright: ∼
Journal keyword(s): asteroseismology - atomic data - opacity - stars: oscillations
Simbad objects: 8
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