EDP Sciences
Free access
Volume 385, Number 2, April II 2002
Page(s) 572 - 584
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20020137

A&A 385, 572-584 (2002)
DOI: 10.1051/0004-6361:20020137

Influence of non-adiabatic temperature variations on line profile variations of slowly rotating $\beta$ Cephei stars and SPBs

II. Simulations of line profile time series
J. De Ridder1, M.-A. Dupret2, C. Neuforge2 and C. Aerts1

1  Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200 B, 3001 Heverlee, Belgium
2  Institut d'Astrophysique et de Géophysique de l'Université de Liège, avenue de Cointe 5, 4000 Liège, Belgium

(Received 2 August 2001 / Accepted 23 January 2002 )

We investigate to what extent non-adiabatic temperature variations at the surface of slowly rotating non-radially pulsating $\beta$ Cephei stars and slowly pulsating B stars affect silicon line profile variations. We use the non-adiabatic amplitudes of the effective temperature and gravity variation presented in Dupret et al. (2002), together with a Kurucz intensity grid, to compute time series of line profile variations. Our simulations point out that the line shapes do not change significantly due to temperature variations. We find equivalent width variations of at most two percent of the mean equivalent width. We confront our results with observational equivalent width variations and with photometrically obtained effective temperature variations.

Key words: stars: early-type -- stars: variables: $\beta$ Cep -- stars: variables: slowly pulsating B stars -- line: profiles

SIMBAD Objects in preparation

© ESO 2002