Astrophysics and Space Science

, Volume 292, Issue 1–4, pp 361–364 | Cite as

Molecular Cloud Collapse

  • A. Allen


Theoretical models of star formation from the collapse of molecular cloud cores have been evolving in complexity for many years. This work describes the evolution of models from the nonrotating, nonmagnetized singular isothermal sphere to rotating, magnetized singular isothermal toroids. Four members of the same family are studied–the four combinations of nonrotation/rotation and nonmagnetization/magnetization. It is found that although rotation alone can hinder collapse to a pointmass, addition of braking from a magnetic field can transport away much of the angular momentum upward in a low-velocity outflow during the collapse phase. For all magnetized cases, accretion proceeds at a constant rate similar to that of the isothermal sphere.

ISM: clouds magnetohydrodynamics star formation 


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Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • A. Allen
    • 1
  1. 1.Academia Sinica Institute of Astronomy and AstrophysicsTaiwan

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