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

M. -P. Bouabid, J. Montalbán, A. Miglio, M.-A. Dupret, A. Grigahcène, A. Noels

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

stars: oscillations - stars: pre-main sequence

Astronomische Nachrichten
Volume 331, Number 9-10, Page 1044
2010 December

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Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia