F. Röpke

Publications65
h-index16
Citations1,660
Highly Influential Citations165
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A Common Explosion Mechanism for Type Ia Supernovae
TLDR
A systematic spectral analysis of a large sample of well-observed type Ia supernovae finds that allsupernovae have low-velocity cores of stable iron-group elements and suggests that their progenitors had the same mass.
Sub-luminous type Ia supernovae from the mergers of equal-mass white dwarfs with mass ∼0.9M⊙
TLDR
A simulation of the merger of two equal-mass white dwarfs that leads to a sub-luminous explosion, although at the expense of requiring a single common-envelope phase, and component masses of ∼0.9M⊙.
The diversity of type Ia supernovae from broken symmetries
TLDR
Multi-dimensional modelling of the explosion physics and radiative transfer reveals that the breaking of spherical symmetry is a critical factor in determining both the width–luminosity relation and the observed scatter about it.
An asymmetric explosion as the origin of spectral evolution diversity in type Ia supernovae
TLDR
It is reported that the spectral diversity is a consequence of random directions from which an asymmetric explosion is viewed, and indicates that ignition at an offset from the centre is a generic feature of type Ia supernovae.
A Three-Dimensional Deflagration Model for Type Ia Supernovae Compared with Observations
A simulation of the thermonuclear explosion of a Chandrasekhar-mass C+O white dwarf, the most popular scenario of a Type Ia supernova (SN Ia), is presented. The underlying modeling is pursued in a…
Towards an understanding of Type Ia supernovae from a synthesis of theory and observations
Motivated by the fact that calibrated light curves of Type Ia supernovae (SNe Ia) have become a major tool to determine the expansion history of the Universe, considerable attention has been given…
Early 56Ni decay gamma rays from SN2014J suggest an unusual explosion
TLDR
Early exposure of material produced in a supernova suggests both an asymmetric event and the production of 56Ni farther out in the ejecta than predicted, which will help astronomers measure distances far beyond where supernovae have been studied.
SNe Ia from double detonations: Impact of core-shell mixing on the carbon ignition mechanism
Sub-Chandrasekhar mass white dwarfs accreting a helium shell on a carbon-oxygen core are potential progenitors of normal Type Ia supernovae. This work focuses on the details of the onset of the…
A Numerical Scheme for the Compressible Low-Mach Number Regime of Ideal Fluid Dynamics
TLDR
Property analysis and performance study of a new technique that allows to correctly represent low Mach number flows with a discretization of the compressible Euler equations through the evolution of its condition number.
From Supernova to Supernova Remnant: The Three-dimensional Imprint of a Thermonuclear Explosion
Recent progress in the three-dimensional modeling of supernovae (SN) has shown the importance of asymmetries for the explosion. This calls for a reconsideration of the modeling of the subsequent…
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