A study of convection with delta Scuti stars in open clusters: Pleiades

Details A study of convection with delta Scuti stars in open clusters: Pleiades A study of convection with delta Scuti stars in open clusters: Pleiades

2002-04-05

arxiv.org/abs/astro-ph/0204097v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, ASP Conference Series (IAU-185)

Scientific paper

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.

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