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118 Publications visible to you, out of a total of 118
Models of pulsationally assisted gravitationally confined detonations with different ignition conditions

Abstract

Not specified

Authors: F. Lach, F. P. Callan, S. A. Sim, F. K. Röpke

Date Published: 1st Mar 2022

Publication Type: Journal

Type Iax supernovae from deflagrations in Chandrasekhar mass white dwarfs

Abstract

Not specified

Authors: F. Lach, F. P. Callan, D. Bubeck, F. K. Röpke, S. A. Sim, M. Schrauth, S. T. Ohlmann, M. Kromer

Date Published: 1st Feb 2022

Publication Type: Journal

Slow White Dwarf Mergers as a New Galactic Source of Trans-Iron Elements

Abstract

Not specified

Authors: Umberto Battino, Claudia Lederer-Woods, Claudia Travaglio, Friedrich Konrad Röpke, Brad Gibson

Date Published: 2022

Publication Type: Journal

Simulations of hydrodynamic phenomena in stellar interiors

Abstract (Expand)

This thesis presents multidimensional hydrodynamic simulations of stellar interiors with a focus on dynamical phenomena at low Mach numbers using the Seven-League Hydro (SLH) code. A better understanding … of these phenomena is crucial to improve the modeling of stellar evolution. It is demonstrated that suitable numerical methods are required to avoid that numerical artifacts and spurious dissipation dominate the actual physical flow. Three-dimensional simulations of convective helium shell burning are used to measure the entrainment of mass into the convective region. This aids the parametrization of entrainment in one-dimensional evolution calculations. Furthermore, the excitation of waves by core convection is simulated and the results are analyzed regarding their physical plausibility and agreement with observations. These simulations demonstrate that the current set of numerical methods used by the SLH code is promising regarding future, more realistic simulations of astrophysical flows.

Author: Leonhard Horst

Date Published: 10th Dec 2021

Publication Type: Doctoral Thesis

Metallicity-dependent nucleosynthetic yields of Type Ia supernovae originating from double detonations of sub- M Ch white dwarfs

Abstract

Not specified

Authors: Sabrina Gronow, Benoit Côté, Florian Lach, Ivo R. Seitenzahl, Christine E. Collins, Stuart A. Sim, Friedrich K. Röpke

Date Published: 1st Dec 2021

Publication Type: Journal

Observational signatures of the surviving donor star in the double-detonation model of Type Ia supernovae

Abstract

Not specified

Authors: Zheng-Wei Liu, Friedrich K. Röpke, Yaotian Zeng, Alexander Heger

Date Published: 1st Oct 2021

Publication Type: Journal

Multidimensional low-Mach number time-implicit hydrodynamic simulations of convective helium shell burning in a massive star

Abstract

Not specified

Authors: L. Horst, R. Hirschi, P. V. F. Edelmann, R. Andrássy, F. K. Röpke

Date Published: 1st Sep 2021

Publication Type: Journal

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