Abstract
view Abstract Citations (75) References (21) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Fragmentation of Proto--Globular Clusters. I. Thermal Instabilities Murray, Stephen D. ; Lin, Douglas N. C. Abstract The metal abundances among the stars within a typical globular cluster are remarkably homogeneous. This indicates that star formation in these systems was a globally coordinated event which occurred over a time span less than or comparable to the collapse time scale of the cluster. This issue is addressed by assuming that the fragmentation of a proto-globular cluster cloud proceeded in two steps. In the first step, thermal instability led to the rapid growth of initial fluctuations. This led to a large contrast in the dynamical time scales between the perturbations and the parent cloud, and the perturbations then underwent gravitational instabilities on short time scales. This process is modeled using one-dimensional hydrodynamic simulations of clouds both with and without external heat sources and self-gravity. The models include the effects of a non-equilibrium H2 abundance. The results indicate that fragmentation can occur on time scales significantly less than the dynamical time scale of the parent cloud. Publication: The Astrophysical Journal Pub Date: April 1989 DOI: 10.1086/167347 Bibcode: 1989ApJ...339..933M Keywords: Astronomical Models; Fragmentation; Globular Clusters; Hydrodynamic Equations; Star Formation; Thermal Instability; Abundance; Gas Heating; Gravitational Collapse; Hydrogen; Astrophysics; CLUSTERS: GLOBULAR; HYDRODYNAMICS; STARS: FORMATION full text sources ADS | Related Materials (2) Erratum: 1989ApJ...344.1052M Part 2: 1989ApJ...346..155M
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