Jens C. Niemeyer

Type Ia Supernova Explosion Models

▪ Abstract Because calibrated light curves of type Ia supernovae have become a major tool to determine the local expansion rate of the universe and also its geometrical structure, considerable atte...

Black hole formation in the early Universe

Supermassive black holes with up to a

Numerical simulations of compressively driven interstellar turbulence - I. Isothermal gas

\rm 10^{9}~M_{\odot}

The characteristic black hole mass resulting from direct collapse in the early Universe

dwell in the centers of present-day galaxies, and their presence has been confirmed at z

A localised subgrid scale model for fluid dynamical simulations in astrophysics - I. Theory and numerical tests

\geq

Dynamics of primordial black hole formation

6. Their formation at such early epochs is still an enigma. Different pathways have been suggested to assemble supermassive black holes in the first billion years after the Big Bang. Direct collapse has emerged as a highly plausible scenario to form black holes as it provides seed masses of

High resolution studies of massive primordial haloes

\rm 10^{5}-10^{6}~M_{\odot}

Turbulence production and turbulent pressure support in the intergalactic medium

. Gravitational collapse in atomic cooling haloes with virial temperatures T

ADAPTIVELY REFINED LARGE EDDY SIMULATIONS OF A GALAXY CLUSTER: TURBULENCE MODELING AND THE PHYSICS OF THE INTRACLUSTER MEDIUM

_{vir} \geq 10^{4}

The small-scale dynamo and the amplification of magnetic fields in massive primordial haloes

~K may lead to the formation of massive seed black holes in the presence of an intense background UV flux. Turbulence plays a central role in regulating accretion and transporting angular momentum. We present here the highest resolution cosmological large-eddy simulations to date which track the evolution of high-density regions on scales of