Inference for stellar opacities from seismic studies of the hybrid β Cep/SPB pulsators
1 Astronomical Institute Wrocław University, ul. Kopernika 11, 51-622 Wrocław, Poland
2 Nicolaus Copernicus Astronomical Center Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland
Published online: 8 September 2017
We present a comprehensive seismic study of the three pulsating stars of β Cep/SPB type: v Eridani, 12 Lacertae and γ Pegasi. Models with the modified mean opacity profile are constructed in order to account for both the observed frequency range and the values of some individual frequencies. To decrease the number of possible solutions, we make use of the non-adiabatic parameter f, whose value is very sensitive to subphotospheric layers where pulsations are driven. This complex seismic modelling shows the need for a significant modification of the opacity profile.
© The Authors, published by EDP Sciences, 2017
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