41 citations · 153 across the 11 of their papers we have counts for
12 papers
Dynamical friction in stratified stellar envelopes
Damien Gagnier
Dynamical friction prescriptions used for common-envelope and planetary engulfment inspirals often assume a homogeneous medium and/or rectilinear perturber motion. A gravitating ob…
Continuous mass ablation of planets engulfed in stellar envelopes
Mike Y. M. Lau, Robert Andrassy, Giovanni Leidi +4
Most stars host short-period planets that are expected to be engulfed during post-main-sequence expansion. The dissolution of engulfed planets has been proposed as a possible mecha…
Phlegethon: a fully compressible magnetohydrodynamic code for simulations in stellar astrophysics
G. Leidi, A. Holas, K. Vitovsky +12
We present PHLEGETHON, a fully compressible, Eulerian magnetohydrodynamic (MHD) code designed for multidimensional simulations in stellar astrophysics. The code uses a time-explici…
Local simulations of common-envelope dynamical inspiral. Impact of rotation, accretion, and stratification
D. Gagnier, G. Leidi, M. Vetter +2
Common envelope evolution (CEE) is a crucial phase in binary stellar evolution. Current global three-dimensional simulations lack the resolution to capture the small-scale dynamics…
Magnetically driven outflows in 3D common-envelope evolution of massive stars
Marco Vetter, Friedrich K. Roepke, Fabian R. N. Schneider +7
Recent three-dimensional magnetohydrodynamical simulations of the common-envelope interaction revealed the self-consistent formation of bipolar magnetically driven outflows launche…
Journey to the center of the common envelope evolution. Inner dynamics of the post-dynamical inspiral
Damien Gagnier, Ondrej Pejcha
Three-dimensional hydrodynamical simulations of common envelope evolution are often terminated soon after the initial dynamical plunge of the companion transitions into a long-last…
Post-dynamical inspiral phase of common envelope evolution. The role of magnetic fields
Damien Gagnier, Ondrej Pejcha
During common envelope evolution, an initially weak magnetic field may undergo amplification by interacting with spiral density waves and turbulence generated in the stellar envelo…
Post-dynamical inspiral phase of common envelope evolution: Binary orbit evolution and angular momentum transport
Damien Gagnier, Ondřej Pejcha
After the companion dynamically plunges through the primary's envelope, the two cores remain surrounded by a common envelope and the decrease of the orbital period s…
Stress-driven spin-down of a viscous fluid within a spherical shell
Damien Gagnier, Michel Rieutord
We investigate the linear properties of the steady and axisymmetric stress-driven spin-down flow of a viscous fluid inside a spherical shell, both within the incompressible and ane…
Evolution of rotation in rapidly rotating early-type stars during the main sequence with 2D models
D. Gagnier, M. Rieutord, C. Charbonnel +2
The understanding of the rotational evolution of early-type stars is deeply related to that of anisotropic mass and angular momentum loss. In this paper, we aim to clarify the rota…
Critical angular velocity and anisotropic mass loss of rotating stars with radiation-driven winds
D. Gagnier, M. Rieutord, C. Charbonnel +2
The understanding of the evolution of early-type stars is tightly related to that of the effects of rapid rotation. For massive stars, rapid rotation combines with their strong rad…
Turbulent transport by diffusive stratified shear flows: from local to global models. Part I: Numerical simulations of a stratified plane Couette flow
P. Garaud, D. Gagnier, J. Verhoeven
Shear-induced turbulence could play a significant role in mixing momentum and chemical species in stellar radiation zones, as discussed by Zahn (1974). In this paper we analyze the…