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Paper: Pulsation and Convection in Cepheids
Volume: 529, RR Lyrae/Cepheid 2019: Frontiers of Classical Pulsators
Page: 332
Authors: Lovekin, C. C.; Odesse, P.
Abstract: The interaction between convection and pulsation in Cepheids is an important but currently not well-modelled phenomenon. It is thought to influence the location of the red edge of the Cepheid instability strip, lead to double- and triple-mode Cepheids, and could explain other discrepancies between current simulations and observations. Convection is an inherently complex process, and while 1D approximations exist, they are not sufficient to reproduce the observations. Recently, multi-dimensional codes have been developed to allow for more realistic simulations of pulsations and convection (eg., ANTARES, SPHERLS) in both RR Lyrae and Cepheid variables. In this work, we use SPHERLS to investigate simulations of convection and pulsation across a range of temperatures corresponding to the observed instability strip. We present preliminary results based on 2D models and discuss the behaviour of the internal convection.
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