Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-07-11
Astronomy and Astrophysics
Astrophysics
11 pages, 13 figures, A&A in press
Scientific paper
10.1051/0004-6361:20052690
We analyze data on pulsation amplitudes and phases for two $\beta$ Cephei stars, $\delta$ Cet and $\nu$ Eri. Str\"omgren photometry and radial velocity measurements are used simultaneously to obtain constraints on mean parameters of the stars and identification of the excited modes. The inference about the radial mode order and mean star parameters is based on comparison of certain complex parameter, $f$, determined from data, with its counterpart derived from linear nonadiabatic modelling of stellar oscillations. The theoretical $f$ values are very sensitive to the adopted opacity data. In our modelling we rely on the data from OPAL and OP projects. Significant differences were found. New seismic models of $\nu$ Eri were constructed with both the OPAL and OP opacities.
Daszy{ń}ska-Daszkiewicz Jadwiga
Dziembowski Wojciech A.
Pamyatnykh Alexey A.
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