A Study of Convection with δ Scuti Stars in Open Clusters: the Pleiades

Suárez, J. C.; Michel, E.; Houdek, G.; Lebreton, Y.; Pérez Hernández, F.
Referencia bibliográfica

Radial and Nonradial Pulsations as Probes of Stellar Physics, ASP Conference Proceedings, Vol. 259. Edited by Conny Aerts, Timothy R. Bedding, and Jørgen Christensen-Dalsgaard. ISBN: 1-58381-099-4. Also IAU Colloquium 185. San Francisco: Astronomical Society of the Pacific, 2002., p.490

Fecha de publicación:
0
2002
Número de autores
5
Número de autores del IAC
0
Número de citas
2
Número de citas referidas
2
Descripción
In this work we propose a preliminary seismic investigation of $delta$ Scuti stars in the Pleiades cluster, focusing on potential diagnostics of convection and core-overshooting. Taking into account the effect of fast rotation in the modelling, we compare observed frequencies for 4 $delta$ Scuti stars with radial linear instability predictions. A satisfying agreement is reached between the predicted ranges of unstable modes and those derived from observations for ``low-mass'' stars ($sim 1.55 M_{odot}$). However, a strong disagreement is found for ``high-mass'' stars ($sim 1.77 M_{odot}$), whatever the mixing length $(alpha)$ value. These results are compared with previous ones obtained for Praesepe.