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Comparing the statistics of interstellar turbulence in simulations and observations - Solenoidal versus compressive turbulence forcing
- C. Federrath, J. Roman-Duval, R. Klessen, W. Schmidt, M. M. Low
- Physics, Environmental Science
- 7 May 2009
Context. Molecular clouds (MCs) exhibit supersonic turbulent velocity and density fluctuations on virtually all scales observed by modern telescopes. The origin and structural characteristics of this…
THE STAR FORMATION RATE OF TURBULENT MAGNETIZED CLOUDS: COMPARING THEORY, SIMULATIONS, AND OBSERVATIONS
- C. Federrath, R. Klessen
- Physics
- 13 September 2012
The role of turbulence and magnetic fields is studied for star formation in molecular clouds. We derive and compare six theoretical models for the star formation rate (SFR)—the Krumholz & McKee (KM),…
The Density Probability Distribution in Compressible Isothermal Turbulence: Solenoidal versus Compressive Forcing
- C. Federrath, R. Klessen, W. Schmidt
- Physics
- 5 August 2008
The probability density function (PDF) of the gas density in turbulent supersonic flows is investigated with high-resolution numerical simulations. In a systematic study, we compare the density…
ON THE STAR FORMATION EFFICIENCY OF TURBULENT MAGNETIZED CLOUDS
- C. Federrath, R. Klessen
- Physics
- 27 November 2012
We study the star formation efficiency (SFE) in simulations and observations of turbulent, magnetized, molecular clouds. We find that the probability density functions (PDFs) of the density and the…
Modelling CO formation in the turbulent interstellar medium
- S. Glover, C. Federrath, M. M. Low, R. Klessen
- Physics, Environmental Science
- 23 July 2009
We present results from high-resolution three-dimensional simulations of turbulent interstellar gas that self-consistently follow its coupled thermal, chemical and dynamical evolution, with a…
MODELING COLLAPSE AND ACCRETION IN TURBULENT GAS CLOUDS: IMPLEMENTATION AND COMPARISON OF SINK PARTICLES IN AMR AND SPH
- C. Federrath, R. Banerjee, P. Clark, R. Klessen
- Physics, Geology
- 25 January 2010
Star formation is such a complex process that accurate numerical tools are needed to quantitatively examine the mass distribution and accretion of fragments in collapsing, turbulent, magnetized gas…
On the universality of supersonic turbulence
- C. Federrath
- Physics
- 17 June 2013
Compressible turbulence shapes the structure of the interstellar medium of our Galaxy and likely plays an important role also during structure formation in the early Universe. The density PDF and the…
Dynamic star formation in the massive DR21 filament
- N. Schneider, T. Csengeri, Usa
- Physics
- 22 March 2010
The formation of massive stars is a highly complex process in which it is not clear whether the star-forming gas is in global gravitational collapse or in an equilibrium state, supported by…
THE FRACTAL DENSITY STRUCTURE IN SUPERSONIC ISOTHERMAL TURBULENCE: SOLENOIDAL VERSUS COMPRESSIVE ENERGY INJECTION
- C. Federrath, R. Klessen, W. Schmidt
- Physics, Environmental Science
- 6 October 2007
In a systematic study, we compare the density statistics in high-resolution numerical experiments of supersonic isothermal turbulence, driven by the usually adopted solenoidal (divergence-free)…
Understanding star formation in molecular clouds - I. Effects of line-of-sight contamination on the column density structure
- N. Schneider, V. Ossenkopf, P. Andre'
- Physics, Environmental Science
- 12 March 2014
Column-density maps of molecular clouds are one of the most important observables in the context of molecular cloud- and star-formation (SF) studies. With the Herschel satellite it is now possible to…
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