1.8k citations · 38.9k across the 730 of their papers we have counts for
7 papers · 1 filter
The Fractal Density Structure in Supersonic Isothermal Turbulence: Solenoidal versus Compressive Energy Injection
Christoph Federrath, Ralf S. Klessen, Wolfram Schmidt
In a systematic study, we compare the density statistics in high resolution numerical experiments of supersonic isothermal turbulence, driven by the usually adopted solenoidal (div…
Star Formation at Very Low Metallicity. IV. Fragmentation Does Not Depend on Metallicity for Cold Initial Conditions
Anne-Katharina Jappsen, Ralf S. Klessen, Simon C. O. Glover +1
Primordial star formation appears to result in stars at least an order of magnitude more massive than modern star formation. It has been proposed that the transition from primordia…
The Influence of Metallicity on Star Formation in Protogalaxies
A. -K. Jappsen, S. C. O. Glover, R. S. Klessen +1
In cold dark matter cosmological models, the first stars to form are believed to do so within small protogalaxies. We wish to understand how the evolution of these early protogalax…
Can Protostellar Jets Drive Supersonic Turbulence in Molecular Clouds?
Robi Banerjee, Ralf S. Klessen, Christian Fendt
Jets and outflows from young stellar objects are proposed candidates to drive supersonic turbulence in molecular clouds. Here, we present the results from multi-dimensional jet sim…
The First Stellar Cluster
Paul C. Clark, Simon C. O. Glover, Ralf S. Klessen
We report results from numerical simulations of star formation in the early universe that focus on gas at very high densities and very low metallicities. We argue that the gas in t…
The First Supernova Explosions: Energetics, Feedback, and Chemical Enrichment
Thomas H. Greif, Jarrett L. Johnson, Volker Bromm +1
We perform three-dimensional smoothed particle hydrodynamics simulations in a realistic cosmological setting to investigate the expansion, feedback, and chemical enrichment propert…