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A Comparison of Methods for Determining the Molecular Content of Model Galaxies
Mark R. Krumholz, Nickolay Y. Gnedin
Recent observations indicate that star formation occurs only in the molecular phase of a galaxy's interstellar medium. A realistic treatment of star formation in simulations and an…
How Universal is the SFR - H2 Relation?
R. Feldmann, N. Y. Gnedin, A. V. Kravtsov
It is a well established empirical fact that the surface density of the star formation rate, Sigma_SFR, strongly correlates with the surface density of molecular hydrogen, Sigma_H2…
On the time variability of the star formation efficiency
R. Feldmann, N. Y. Gnedin
A star formation efficiency per free fall time that evolves over the life time of giant molecular clouds (GMCs) may have important implications for models of supersonic turbulence…
Effect of Cosmic UV Background on Star Formation in High Redshift Galaxies
Nickolay Y. Gnedin
The effect of the cosmic UV background on star formation in high redshift galaxies is explored by means of high resolutions cosmological simulations. The simulations include star f…
Measuring Gas Accretion and Angular Momentum near Simulated Supermassive Black Holes
Robyn Levine, Nickolay Y. Gnedin, Andrew J. S. Hamilton
Using cosmological simulations with a dynamic range in excess of 10 million, we study the transport of gas mass and angular momentum through the circumnuclear region of a disk gala…
Environmental Dependence of the Kennicutt-Schmidt Relation in Galaxies
Nickolay Y. Gnedin, Andrey V. Kravtsov
We present a detailed description of a phenomenological H2 formation model and local star formation prescription based on the density of molecular (rather than total) gas. Such app…