231 citations · 709 across the 16 of their papers we have counts for
14 papers · 1 filter
3D hydrodynamics simulations of a 3 core-helium burning star
Simon Blouin, Falk Herwig, Huaqing Mao +2
The inner structure of core-helium burning (CHeB) stars remains uncertain due to the yet unknown nature of mixing at the boundary of their cores. Large convective cores beyond a ba…
3D hydrodynamics simulations of internal gravity waves in red giant branch stars
Simon Blouin, Huaqing Mao, Falk Herwig +3
We present the first 3D hydrodynamics simulations of the excitation and propagation of internal gravity waves (IGWs) in the radiative interiors of low-mass stars on the red giant b…
3D hydrodynamic simulations of massive main-sequence stars II. Convective excitation and spectra of internal gravity waves
William Thompson, Falk Herwig, Paul R. Woodward +4
Recent photometric observations of massive stars have identified a low-frequency power excess which appears as stochastic low-frequency variability in light curve observations. We…
3D hydrodynamic simulations of massive main-sequence stars. I. Dynamics and mixing of convection and internal gravity waves
Falk Herwig, Paul R. Woodward, Huaqing Mao +6
We performed 3D hydrodynamic simulations of the inner radial extent of a star in the early phase of the main sequence and investigate core con…
3D1D hydro-nucleosynthesis simulations. I. Advective-reactive post-processing method and its application to H ingestion into He-shell flash convection in rapidly accreting white dwarfs
David Stephens, Falk Herwig, Paul Woodward +3
We present two mixing models for post-processing of 3D hydrodynamic simulations applied to convective-reactive i-process nucleosynthesis in a rapidly accreting white dwarf (RAWD) w…
Simulating 3-D Stellar Hydrodynamics using PPM and PPB Multifluid Gas Dynamics on CPU and CPU+GPU Nodes
Paul R. Woodward, Pei-Hung Lin, Huaqing Mao +2
The special computational challenges of simulating 3-D hydrodynamics in deep stellar interiors are discussed, and numerical algorithmic responses described. Results of recent simul…
H-He Shell Interactions and Nucleosynthesis in Massive Population III Stars
Ondrea Clarkson, Falk Herwig, Robert Andrassy +3
We report on our ongoing investigation into the nucleosynthetic and hydrodynamic nature of mixing at the interface between the H- and He-convection zones in massive Pop III stars.…
The i-process yields of rapidly-accreting white dwarfs from multicycle He-shell flash stellar evolution models with mixing parameterizations from 3D hydrodynamics simulations
Pavel Denissenkov, Falk Herwig, Paul Woodward +3
We have modelled the multicycle evolution of rapidly-accreting CO white dwarfs (RAWDs) with stable H burning intermittent with strong He-shell flashes on their surfaces for $0.7\le…
Convective-reactive nucleosynthesis of K, Sc, Cl and p-process isotopes in O-C shell mergers
C. Ritter, R. Andrassy, B. Côté +4
We address the deficiency of odd-Z elements P, Cl, K and Sc in galactic chemical evolution models through an investigation of the nucleosynthesis of interacting convective O- and C…
Idealised hydrodynamic simulations of turbulent oxygen-burning shell convection in 4π geometry
Samuel Jones, Robert Andrassy, Stou Sandalski +3
This work investigates the properties of convection in stars with particular emphasis on entrainment across the upper convective boundary (CB). Idealised simulations of turbulent c…
Global non-spherical oscillations in 3-D simulations of the H-ingestion flash
Falk Herwig, Paul R. Woodward, Pei-Hung Lin +2
We performed 3-D simulations of proton-rich material entrainment into \czw-rich He-shell flash convection and the subsequent H-ingestion flash that took place in the post-AGB star…
Hydrodynamic simulations of H entrainment at the top of He-shell flash convection
Paul R. Woodward, Falk Herwig, Pei-Hung Lin
We present the first 3-dimensional, fully compressible gas-dynamics simulations in geometry of He-shell flash convection with proton-rich fuel entrainment at the upper boundar…
Convective-reactive proton-C12 combustion in Sakurai's object (V4334 Sagittarii) and implications for the evolution and yields from the first generations of stars
Falk Herwig, Marco Pignatari, Paul R. Woodward +5
Depending on mass and metallicity as well as evolutionary phase, stars occasionally experience convective-reactive nucleosynthesis episodes. We specifically investigate the situati…
The Hydrodynamic Environment for the s Process in the He-Shell Flash of AGB Stars
Paul R. Woodward, David H. Porter, Falk Herwig +3
The He-shell flash convection in AGB stars is the site for the high-temperature component of the s-process in low- and intermediate mass giants, driven by the Ne22 neutron source.…