Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-11-18
Astron.Astrophys. 398 (2003) 677-686
Astronomy and Astrophysics
Astrophysics
10 pages, 9 figures Accepted for publication in Astronomy and Astrophysics
Scientific paper
10.1051/0004-6361:20021679
We present an improved version of the method of photometric mode identification of Heynderickx et al. (1994). Our new version is based on the inclusion of precise non-adiabatic eigenfunctions determined in the outer stellar atmosphere according to the formalism recently proposed by Dupret et al.(2002). Our improved photometric mode identification technique is therefore no longer dependent on ad hoc parameters for the non-adiabatic effects. It contains the complete physical conditions of the outer atmosphere of the star, provided that rotation does not play a key role. We apply our improved method to the two slowly pulsating B stars HD 74560 and HD 138764 and to the beta Cephei star EN (16) Lac. Besides identifying the degree l of the pulsating stars, our method is also a tool for improving the knowledge of stellar interiors and atmospheres, by imposing constraints on parameters such as the metallicity and the mixing-length parameter alpha (a procedure we label non-adiabatic asteroseismology).
Aerts Christine
de Cat Peter
de Ridder Joris
Dupret Marc-Antoine
Noels Arlette
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