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- Title
The effect of the dynamical state of clusters on gas expulsion and infant mortality.
- Authors
Goodwin, Simon P.
- Abstract
The star-formation efficiency (SFE) of a star cluster is thought to be the critical factor in determining if the cluster can survive for a significant (>50 Myr) time. There is an often quoted critical SFE of ∼30% for a cluster to survive gas expulsion. I reiterate that the SFE is not the critical factor; rather, it is the dynamical state of the stars (as measured by their virial ratio) immediately before gas expulsion. If the stars in a star cluster are born in an (even slightly) cold dynamical state, then the survivability of a cluster can be greatly increased.
- Subjects
STAR formation; EARLY stars; STAR clusters; A stars; ASTRONOMY
- Publication
Astrophysics & Space Science, 2009, Vol 324, Issue 2-4, p259
- ISSN
0004-640X
- Publication type
Article
- DOI
10.1007/s10509-009-0116-5