Fragmentation in turbulent primordial gas

Details Fragmentation in turbulent primordial gas Fragmentation in turbulent primordial gas

2010-07-16

arxiv.org/abs/1007.2763v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 pages, 1 figure. Submitted for the conference proceedings of IAU Symposium 270 (eds. Alves, Elmegreen, Girart, Trimble)

Scientific paper

We report results from numerical simulations of star formation in the early universe that focus on the role of subsonic turbulence, and investigate whether it can induce fragmentation of the gas. We find that dense primordial gas is highly susceptible to fragmentation, even for rms turbulent velocity dispersions as low as 20% of the initial sound speed. The resulting fragments cover over two orders of magnitude in mass, ranging from 0.1 to 40 solar masses. However, our results suggest that the details of the fragmentation depend on the local properties of the turbulent velocity field and hence we expect considerable variations in the resulting stellar mass spectrum in different halos.

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