Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001mnras.320....1g&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 320, Issue 1, pp. 1-11.
Astronomy and Astrophysics
Astronomy
1
Methods: Numerical, Stars: Formation, Ism: Clouds, Ism: General, Ism: Structure
Scientific paper
A smoothed particle hydrodynamic (SPH) code is used to model a collapsing region of the interstellar medium (ISM). A region of the ISM is seeded with coolant material ejected from a supernova. The resulting pressure imbalance between the cooling region and the surrounding ISM induces collapse. The collapse first forms dense low-temperature regions (protoclouds) each containing several tens of solar masses of material and in quasi-equilibrium with the surrounding ISM. Turbulence is generated within the collapsing regions as they form. Collisions between protoclouds leads to regions of further increased mass and density, the final outcome being a dense cold cloud with mean density 10-18kgm-3, mean temperature about 20K and total mass a few hundred solar masses. The final cloud is sufficiently turbulent for star formation to occur within it. A new form of boundary condition was used in the SPH simulation to solve the problem inherent in modelling a continuum.
Golanski Y.
Woolfson Michael M.
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