Analogues of Cores and Stars in Simulated Molecular Clouds

Details Analogues of Cores and Stars in Simulated Molecular Clouds Analogues of Cores and Stars in Simulated Molecular Clouds

Apr 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..270..129w&link_type=abstract

Computational Star Formation, Proceedings of the International Astronomical Union, IAU Symposium, Volume 270, p. 129-132

Statistics

Computation

Ism: Structure, Submillimeter, Methods: Data Analysis, Stars: Mass Function, Stars: Formation, Methods: Numerical

Scientific paper

We use images derived from collapsing, turbulent molecular cloud simulations without sinks to explore the effects of finite image angular resolution and noise on the derived clump mass function. These effects randomly perturb the clump masses, producing a lognormal clump mass function with a Salpeter-like high mass end. We show that the characteristic break mass of the simulated clump mass functions changes with the angular resolution of the images in a way that is entirely consistent with the observations. We also present some cautionary tales regarding sink particles and highlight the need to ensure that sinks actually correspond to distinct collapsing objects. We test several popular numerical sink criteria in the literature and compare to converged, non-sink results.

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