465 citations · 2.6k across the 35 of their papers we have counts for
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EK Eridani: the tip of the iceberg of giants which have evolved from magnetic Ap stars
M. Aurière, R. Konstantinova-Antova, P. Petit +8
We observe the slowly-rotating, active, single giant, EK Eri, to study and infer the nature of its magnetic field directly. We used the spectropolarimeter NARVAL at the Telescope B…
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…
Large-scale magnetic topologies of mid-M dwarfs
J. Morin, J. -F. Donati, P. Petit +13
We present in this paper the first results of a spectropolarimetric analysis of a small sample (~ 20) of active stars ranging from spectral type M0 to M8, which are either fully-co…
Toroidal versus poloidal magnetic fields in Sun-like stars: a rotation threshold
P. Petit, B. Dintrans, S. K. Solanki +8
From a set of stellar spectropolarimetric observations, we report the detection of surface magnetic fields in a sample of four solar-type stars, namely HD 73350, HD 76151, HD 14623…
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…