Hostname: page-component-cc8bf7c57-7lvjp Total loading time: 0 Render date: 2024-12-12T07:43:37.223Z Has data issue: false hasContentIssue false
  • English
  • Français

Planetesimal Formation by Gravitational Instability—The Goldreich-Ward Hypothesis Revisited

Published online by Cambridge University Press:  26 May 2016

Andrew N. Youdin  and
Frank H. Shu
Andrew N. Youdin
Affiliation:
Astronomy Dept., University of California, Berkeley, CA 94720, USA
Frank H. Shu
Affiliation:
Astronomy Dept., University of California, Berkeley, CA 94720, USA

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 consider the formation of planetesimals via gravitational instability. While minimum solar nebula (MSN) models are known to be gravitationally stable, we find that sufficiently metal enriched and/or colder discs can yield planetesimals by the Goldreich-Ward mechanism (GWM). This is because the shear between gas and solids, previously believed to render the GWM ineffective, can only stir a finite amount of solids.

Type
Part II: Progress in the theory of planet formation
Information
Symposium - International Astronomical Union , Volume 202: Planetary Systems in the Universe – Observation, Formation and Evolution , 2004 , pp. 250 - 252
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

Cuzzi, J. N., Dobrovolskis, A. R., & Champney, J. M. 1993, Icarus, 106, 102.CrossRefGoogle Scholar
Goldreich, P., & Ward, W. R. ApJ, 183, 105.Google Scholar
Hayashi, C. 1981, Prog. Theor. Phys. Supp., 70, 35.CrossRefGoogle Scholar
Osterloh, M., & Beckwith, S. V. W. 1995, ApJ, 439, 288.Google Scholar
Safronov, V. S. 1969, Evolution of the Protoplanetary Cloud and Formation of the Earth and the Planets. (Moscow: Nauka Press)Google Scholar
Sekiya, M. 1983, Progress in Theoretical Physics, 69, 1116.Google Scholar
Sekiya, M. 1998, Icarus, 133, 298.Google Scholar
Weidenschilling, S. J. 1980, Icarus, 44, 172.CrossRefGoogle Scholar