Theoretical study of $γ$ Doradus pulsations in pre-main sequence stars

Details Theoretical study of $γ$ Doradus pulsations in pre-main sequence stars Theoretical study of $γ$ Doradus pulsations in pre-main sequence stars

2010-07-16

arxiv.org/abs/1007.2746v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

5 pages, 6 figures, Proc. HELAS IV Conference, Lanzarote, February 2010. Eds T. Roca Cort\'es, P. Pall\'e and S. Jim\'enez Rey

Scientific paper

The question of the existence of pre-main sequence (PMS) $\gamma$~Doradus ($\gamma$~Dor) has been raised by the observations of young clusters such as NGC~884 hosting $\gamma$~Dor members. We have explored the properties of $\gamma$~Dor type pulsations in a grid of PMS models covering the mass range $1.2 M_\odot < M_* < 2.5 M_\odot$ and we derive the theoretical instability strip (IS) for the PMS $\gamma$~Dor pulsators. We explore the possibility of distinguishing between PMS and MS $\gamma$~Dor by the behaviour of the period spacing of their high order $gravity$-modes ($g$-modes).

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