Rotation and Convective Core Overshoot in θ Ophiuchi

Details Rotation and Convective Core Overshoot in θ Ophiuchi Rotation and Convective Core Overshoot in θ Ophiuchi

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1170..360l&link_type=abstract

STELLAR PULSATION: CHALLENGES FOR THEORY AND OBSERVATION: Proceedings of the International Conference. AIP Conference Proceedin

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Cepheids, Rr Lyrae Stars, Rv Tauri And Pv Telescopii Variables, Stellar Characteristics And Properties

Scientific paper

Recent 1D modelling of the β Cephei stars such as θ Ophiuchi and ν Eridani suggests that core overshooting is required to match the observed frequencies. However, it is possible that the the mixing produced by core overshoot in these 1D models could be produced by other processes, such as rotation. We use a 2D stellar evolution code and a 2D linear adiabatic pulsation code to investigate the effects of uniform rotation and overshoot on low order p-modes. By comparing models with different combinations of rotation and overshoot, we are able to determine to what extent core overshoot is necessary in the presence of rotation. These models are presented in the context of the β Cephei star θ Ophiuchi, for which 7 frequencies have been identified with l = 0-2.

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