RESEARCH
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Influence of rotation on the pulsations of γ Doradus stars

M. -P. Bouabid, M.-A. Dupret, A. Grigahcène

Abstract
γ Doradus (γ Dor) are late A and F-type stars pulsating with high order gravity modes (g-modes). Their rotation and pulsation frequencies are often of the same order. Hence, rotation is expected to affect significantly the characteristics of pulsations. Adopting the so-called traditional approximation of rotation to treat the Coriolis force, we explore the influence of rotation over the stability of γ Dor stellar models covering the mass range 1.2M < M* < 2.5M. We investigate the effects of rotation on the pulsation parameters of γ Dor stars : period spacings, range of excited modes, theoretical instability strips.

Seismological Challenges for Stellar Structure, HELAS IV
T. Roca, P. Palle, S. Jimenez

Astronomische Nachrichten
Volume 331, Number 9-10, Page P35_1
2010 December

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