Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-25T15:27:22.234Z Has data issue: false hasContentIssue false
  • English
  • Français

Three-dimensional MHD simulations of molecular cloud fragmentation regulated by gravity, ambipolar diffusion, and turbulence

Published online by Cambridge University Press:  01 November 2008

Takahiro Kudoh  and
Shantanu Basu
Takahiro Kudoh
Affiliation:
Division of Theoretical Astronomy, National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan email: [email protected]
Shantanu Basu
Affiliation:
Department of Physics and Astronomy, University of Western Ontario, London, Ontario N6A 3K7, Canada email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We find that the star formation is accelerated by the supersonic turbulence in the magnetically dominated (subcritical) clouds. We employ a fully three-dimensional simulation to study the role of magnetic fields and ion-neutral friction in regulating gravitationally driven fragmentation of molecular clouds. The time-scale of collapsing core formation in subcritical clouds is a few ×107 years when starting with small subsonic perturbations. However, it is shortened to approximately several ×106 years by the supersonic flows in the clouds. We confirm that higher-spacial resolution simulations also show the same result.

Keywords

MHD – stars: formation – ISM: magnetic fields
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S259: Cosmic Magnetic Fields: From Planets, to Stars and Galaxies , November 2008 , pp. 115 - 116
Copyright
Copyright © International Astronomical Union 2009

References

Kudoh, T., Basu, S., Ogata, Y., & Yabe, T. 2007, MNRAS 380, 499CrossRefGoogle Scholar
Kudoh, T. & Basu, S. 2008, ApJ 679, L97CrossRefGoogle Scholar
Li, Z.-Y. & Nakamura, F. 2004, ApJ 609, L83CrossRefGoogle Scholar