Publications (12)
Theoretical Studies of Accretion of Matter onto White Dwarfs and the Single Degenerate Scenario for Supernovae of Type Ia
S. Starrfield, C. Iliadis, F. X. Timmes +4
We present a brief summary of the Single Degenerate Scenario for the progenitors of Type Ia Supernovae in which it is assumed that a low mass carbon-oxygen white dwarf is growing i…
Realistic 3D hydrodynamics simulations find significant turbulent entrainment in massive stars
F. Rizzuti, R. Hirschi, C. Georgy +3
Our understanding of stellar structure and evolution coming from one-dimensional (1D) stellar models is limited by uncertainties related to multi-dimensional processes taking place…
Dependence of Convective Boundary Mixing on Boundary Properties and Turbulence Strength
A. Cristini, R. Hirschi, C. Meakin +3
Convective boundary mixing is one of the major uncertainties in stellar evolution. In order to study its dependence on boundary properties and turbulence strength in a controlled w…
3D simulations of a complete convective silicon shell burning phase
V. Varma, R. Hirschi, F. Rizzuti +7
We present 3D hydrodynamic simulations of a complete silicon shell burning phase until fuel exhaustion at the end of the evolution of a 14 core-collapse supernova progenit…
General-Relativistic Simulations of Three-Dimensional Core-Collapse Supernovae
C. D. Ott, E. Abdikamalov, P. Moesta +6
We study the three-dimensional (3D) hydrodynamics of the post-core-bounce phase of the collapse of a 27-solar-mass star and pay special attention to the development of the standing…
The Detonation Mechanism of the Pulsationally-Assisted Gravitationally-Confined Detonation Model of Type Ia Supernovae
G. C. Jordan, C. Graziani, R. T. Fisher +7
We describe the detonation mechanism comprising the "Pulsationally Assisted" Gravitationally Confined Detonation (GCD) model of Type Ia supernovae SNe Ia. This model is analogous t…
3D simulations of convective shell Neon-burning in a massive star
C. Georgy, F. Rizzuti, R. Hirschi +6
The treatment of convection remains a major weakness in the modelling of stellar evolution with one-dimensional (1D) codes. The ever increasing computing power makes now possible t…
3D stellar evolution: hydrodynamic simulations of a complete burning phase in a massive star
F. Rizzuti, R. Hirschi, W. D. Arnett +5
Our knowledge of stellar evolution is driven by one-dimensional (1D) simulations. 1D models, however, are severely limited by uncertainties on the exact behaviour of many multi-dim…
Dynamics in a stellar convective layer and at its boundary: Comparison of five 3D hydrodynamics codes
R. Andrassy, J. Higl, H. Mao +18
Our ability to predict the structure and evolution of stars is in part limited by complex, 3D hydrodynamic processes such as convective boundary mixing. Hydrodynamic simulations he…
Towards 21st Century Stellar Models: Star Clusters, Supercomputing, and Asteroseismology
S. W. Campbell, T. N. Constantino, V. D'Orazi +8
Stellar models provide a vital basis for many aspects of astronomy and astrophysics. Recent advances in observational astronomy -- through asteroseismology, precision photometry, h…
Convective core entrainment in 1D main sequence stellar models
L. J. A. Scott, R. Hirschi, C. Georgy +5
3D hydrodynamics models of deep stellar convection exhibit turbulent entrainment at the convective-radiative boundary which follows the entrainment law, varying with boundary penet…
Hydrodynamic Studies of the Evolution of Recurrent, Symbiotic, and Dwarf Novae: The White Dwarf Components are Growing in Mass
S. Starrfield, F. X. Timmes, C. Iliadis +4
Symbiotic binaries are systems containing white dwarfs (WDs) and red giants. Symbiotic novae are those systems in which thermonuclear eruptions occur on the WD components. These ar…