Astrophysics and Space Science

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

Molecular Cloud Collapse

  • A. Allen
Article
  • 54 Downloads

Abstract

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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References

  1. Allen, A., Shu, F. H. and Li, Z. Y.: 2003a, ApJ 599, 351.CrossRefADSGoogle Scholar
  2. Allen, A., Li, Z. Y. and Shu, F. H.: 2003b, ApJ 599, 363.CrossRefADSGoogle Scholar
  3. Allen, A., Chuang, H., Choi, M. and Li, Z.: 2003c, Kluwer Ap&SS Library volume 299, Open Issues in Local Star Formation, 375.Google Scholar
  4. Galli, D. and Shu, F. H.: 1993a, ApJ 417, 220.CrossRefADSGoogle Scholar
  5. Galli, D. and Shu, F. H.: 1993b, ApJ 417, 243.CrossRefADSGoogle Scholar
  6. Hayashi, C., Narita, S. and Miyama, S. M.: 1982, Prog. Theor. Phys. 68, 1949.CrossRefADSGoogle Scholar
  7. Li, Z. Y. and Shu, F. H.: 1996, ApJ 472, 211.CrossRefADSGoogle Scholar
  8. Shu, F. H.: 1977, ApJ 214, 488.CrossRefADSGoogle Scholar
  9. Stone, J. M. and Norman, M. L.: 1992a, ApJ Suppl., 80, 753.CrossRefADSGoogle Scholar
  10. Stone, J. M. and Norman, M. L.: 1992b, ApJ Suppl., 80, 791.CrossRefADSGoogle Scholar
  11. Toomre, A.: 1982, ApJ 259, 535.CrossRefADSGoogle Scholar

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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