4 papers · 1 filter
DNS of the kappa-mechanism
T. Gastine, B. Dintrans
We present a purely-radiative hydrodynamic model of the kappa-mechanism that sustains radial oscillations in Cepheid variables. We determine the physical conditions favourable for…
Large-scale magnetic topologies of early M dwarfs
JF Donati, J Morin, P Petit +12
We present here additional results of a spectropolarimetric survey of a small sample of stars ranging from spectral type M0 to M8 aimed at investigating observationally how dynamo…
Direct numerical simulations of the kappa-mechanism II. The nonlinear saturation and Hertzsprung's progression
T. Gastine, B. Dintrans
Context: We study the kappa-mechanism that excites radial oscillations in Cepheid variables. Aims: We address the mode couplings that manages the nonlinear saturation of the instab…
DNS of the kappa-mechanism. I. Radial modes in the purely radiative case
T. Gastine, B. Dintrans
Context: Hydrodynamical model of the kappa-mechanism in a purely radiative case. Aims: First, to determine the physical conditions propitious to kappa-mechanism in a layer with a c…