Fragmentation of Molecular Clouds: The Initial Phase of a Stellar Cluster

Details Fragmentation of Molecular Clouds: The Initial Phase of a Stellar Cluster Fragmentation of Molecular Clouds: The Initial Phase of a Stellar Cluster

1998-05-11

arxiv.org/abs/astro-ph/9805125v1

Astrophys.J. 501 (1998) L205-208

Astronomy and Astrophysics

Astrophysics

8 pages, including 3 figures, accepted for publication in ApJ Letters (figure 1 has been degraded in resolution to reduce size

Scientific paper

10.1086/311471

The isothermal gravitational collapse and fragmentation of a region within a molecular cloud and the subsequent formation of a protostellar cluster is investigated numerically. The clump mass spectrum which forms during the fragmentation phase can be well approximated by a power law distribution dN/dM ~ M^(-1.5). In contrast, the mass spectrum of protostellar cores that form in the centers of Jeans-unstable clumps and evolve through accretion and N-body interactions is described by a log-normal distribution with a width that is in excellent agreement with observations of multiple stellar systems.

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