5 papers
Oscillation power spectra of the Sun and of Alpha Cen A: observations versus models
R. Samadi, M. J. Goupil, F. Baudin +4
Hydrodynamical, 3D simulations of the outer layers of the Sun and Alpha Cen A are used to obtain constraints on the properties of turbulent convection in such stars. These constrai…
Oscillation power across the HR diagram : sensitivity to the convection treatment
Reza Samadi, Guenter Houdek, Marie-Jo Goupil +2
Solar-like oscillations are stochastically excited by turbulent convection. In this work we investigate changes in the acoustic oscillation power spectrum of solar-type stars by va…
Oscillation power as a test of stellar turbulence : Scanning the HR diagram
Reza Samadi, Marie-Jo Goupil, Yveline Lebreton +1
The acoustic power injected by turbulent convection into solar-like oscillations depends on the details of the turbulent spectrum. A theoretical formulation for the oscillation pow…
Turbulent Convection in Pulsating Stars
J. Robert Buchler, Philip Yecko, Zoltan Kollath +1
We review recent results of stellar pulsation modelling that show that even very simple one-dimensional models for time dependent turbulent energy diffusion and convection provide…
Modelling the Phase-Locked Pulsations of a P=14d EROS Star
Z. Kollath, J. R. Buchler, J. P. Beaulieu +1
The Fourier spectral analysis of this object suggests a nonlinear pulsation of period approximately 14d with a 3:2 frequency lock between two vibrational modes. We discuss an exten…