Giant Molecular Clouds and Cluster Formation
نویسندگان
چکیده
منابع مشابه
Star cluster disruption by giant molecular clouds
We investigate encounters between giant molecular clouds (GMCs) and star clusters. We propose a single expression for the energy gain of a cluster due to an encounter with a GMC, valid for all encounter distances and GMC properties. This relation is verified with N -body simulations of cluster-GMC encounters, where the GMC is represented by a moving analytical potential. Excellent agreement is ...
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We explore, through a simplified, semianalytic model, the formation of dense clusters containing massive stars. The parent cloud spawning the cluster is represented as an isothermal sphere. This sphere is in nearYforce balance between self-gravity and turbulent pressure. Self-gravity, mediated by turbulent dissipation, drives slow contraction of the cloud, eventually leading to a sharp central ...
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A Lagrangian, particle-based numerical method (tree code gravity plus smoothed particle hydrodynamics) was used to simulate clump-clump collisions occurring within GMCs. The collisions examined were between 75M clumps at a relative Mach number ofM = 3. The clumps were modelled using isothermal spheres which were individually in stable equilibrium. The collisions formed shock-compressed layers, ...
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The isothermal gravitational collapse and fragmentation of a molecular cloud region 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. In contrast, the mass spectrum of protostellar cores that form in the centers of Jeans unstable cl...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 2002
ISSN: 0074-1809
DOI: 10.1017/s0074180900224303