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On the small-scale stability of thermonuclear flames in Type Ia supernovae
F. K. Roepke, J. C. Niemeyer, W. Hillebrandt
We present a numerical model which allows us to investigate thermonuclear flames in Type Ia supernova explosions. The model is based on a finite-volume explicit hydrodynamics solve…
Minimal modifications of the primordial power spectrum from an adiabatic short distance cutoff
J. C. Niemeyer, R. Parentani, D. Campo
As a simple model for unknown Planck scale physics, we assume that the quantum modes responsible for producing primordial curvature perturbations during inflation are placed in the…
Investigating the Flame Microstructure in Type Ia Supernovae
F. K. Roepke, W. Hillebrandt, J. C. Niemeyer
We present a numerical model to study the behavior of thermonuclear flames in the discontinuity approximation. This model is applied to investigate the Landau-Darrieus instability…
Models of Type Ia Supernova Explosions
J. C. Niemeyer, M. Reinecke, W. Hillebrandt
Type Ia supernovae have become an indispensable tool for studying the expansion history of the universe, yet our understanding of the explosion mechanism is still incomplete. We de…
Cosmological consequences of short distance physics
Jens C. Niemeyer
Inflation can act as a space-time microscope for Planck or string scale effects, leaving potentially observable traces in the primordial perturbation spectrum. I discuss two framew…