229 citations · 798 across the 15 of their papers we have counts for
16 papers
Effects of Self-Interaction and of an Ideal Gas in Binary Mergers of Bosonic Dark Matter Cores
Carlos Tena-Contreras, Ivan Alvarez-Rios, Francisco S. Guzman +1
We study binary mergers of dark matter cores in the Bose-Einstein condensate (BECDM) model. We include two scenarios: scalar self-interaction and the presence of a gravitationally…
Post-inflationary structure formation boosted by parametric self-resonance
Benedikt Eggemeier, Peter Hayman, Jens C. Niemeyer +1
The post-inflationary Universe can pass through a long epoch of effective matter-dominated expansion. This era may allow for both the parametric amplification of initial fluctuatio…
Viscosity, pressure, and support of the gas in simulations of merging cool-core clusters
W. Schmidt, C. Byrohl, J. F. Engels +2
Major mergers are considered to be a significant source of turbulence in clusters. We performed a numerical simulation of a major merger event using nested-grid initial conditions,…
Impact of baryonic streaming velocities on the formation of supermassive black holes via direct collapse
M. A. Latif, J. C. Niemeyer, D. R. G. Schleicher
Baryonic streaming motions produced prior to the epoch of recombination became supersonic during the cosmic dark ages. Various studies suggest that such streaming velocities change…
The characteristic black hole mass resulting from direct collapse in the early universe
M. A. Latif, D. R. G. Schleicher, W. Schmidt +1
Black holes of a billion solar masses are observed in the infant universe a few hundred million years after the Big Bang. The direct collapse of protogalactic gas clouds in primord…
Black hole formation in the early universe
M. A. Latif, D. R. G. Schleicher, W. Schmidt +1
Supermassive black holes with up to a dwell in the centers of present-day galaxies, and their presence has been confirmed at z 6. Their formation at s…
High resolution studies of massive primordial haloes
M. A. Latif, D. R. G. Schleicher, W. Schmidt +1
Atomic cooling haloes with virial temperatures K are the most plausible sites for the formation of the first galaxies and the first intermediate mass blac…
Turbulence Modelling and Stirring Mechanisms in the Cosmological Large-scale Structure
L. Iapichino, W. Schmidt, J. C. Niemeyer +1
FEARLESS (Fluid mEchanics with Adaptively Refined Large Eddy SimulationS) is a numerical scheme for modelling subgrid-scale turbulence in cosmological adaptive mesh refinement simu…
Turbulence production and turbulent pressure support in the intergalactic medium
L. Iapichino, W. Schmidt, J. C. Niemeyer +1
The injection and evolution of turbulence in the intergalactic medium is studied by means of mesh-based hydrodynamical simulations, including a subgrid scale (SGS) model for small-…
Forced turbulence in thermally bistable gas: A parameter study
D. Seifried, W. Schmidt, J. C. Niemeyer
Context: The thermal instability is one of the dynamical agents for turbulence in the diffuse interstellar medium, where both, turbulence and thermal instability interact in a high…
Cosmological first-order phase transitions beyond the standard inflationary scenario
Aleksandar Rakic, Dennis Simon, Julian Adamek +1
Motivated by cosmological first-order phase transitions we examine the nucleation and evolution of vacuum bubbles in non-vacuum environments. Non-standard backgrounds can be releva…
Turbulence in a 3D deflagration model for type Ia SNe: II. Intermittency and the deflagration-to-detonation transition probability
W. Schmidt, F. Ciaraldi-Schoolmann, J. C. Niemeyer +2
The delayed detonation model describes the observational properties of the majority of type Ia supernovae very well. Using numerical data from a three-dimensional deflagration mode…
On the fate of vacuum bubbles on matter backgrounds
Aleksandar Rakic, Dennis Simon, Julian Adamek +1
In this letter we discuss cosmological first order phase transitions with de Sitter bubbles nucleating on (inhomogeneous) matter backgrounds. The de Sitter bubble can be a toy mode…
Turbulence modeling and the physics of the intra-cluster medium
L. Iapichino, A. Maier, W. Schmidt +1
FEARLESS (Fluid mEchanics with Adaptively Refined Large Eddy SimulationS) is a new numerical scheme arising from the combined use of subgrid scale (SGS) model for turbulence at the…
Adaptively refined large eddy simulations of clusters
A. Maier, L. Iapichino, W. Schmidt +1
We present a numerical scheme for modelling unresolved turbulence in cosmological adaptive mesh refinement codes. As a first application, we study the evolution of turbulence in th…
Varying speed of light cosmology from a stringy short distance cutoff
J. C. Niemeyer
It is shown that varying speed of light cosmology follows from a string-inspired minimal length uncertainty relation. Due to the reduction of the available phase space volume per q…