Cluster Formation in Contracting Molecular Clouds
نویسندگان
چکیده
منابع مشابه
Cluster Formation in Contracting Molecular Clouds
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 ...
متن کاملFragmentation in Molecular Clouds: The Formation of a Stellar Cluster
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...
متن کاملFragmentation in Molecular Clouds: The Formation of a Stellar Cluster
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...
متن کاملAccretion in Gravitationally Contracting Clouds
Accretion flow in a contracting magnetized interstellar cloud was studied using magnetohydrodynamical simulations and a nested grid technique. First, the interstellar magnetized cloud experiences a “runaway collapse” phase, in which the central density increases drastically within a finite time scale. Finally, it enters an accretion phase, in which inflowing matter accretes onto a central high-...
متن کاملThe Formation of Molecular Clouds
In a recent paper, Elmegreen (2000) has made a cogent case, from an observational point of view, that the lifetimes of molecular clouds are comparable to their dynamical timescales. If so, this has important implications for the mechanisms by which molecular clouds form. In particular we consider the hypothesis that molecular clouds may form not by in situ cooling of atomic gas, but rather by t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2007
ISSN: 0004-637X,1538-4357
DOI: 10.1086/520574