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Title: Formation of compact clusters from high resolution hybrid cosmological simulations

The early universe hosted a large population of small dark matter 'minihalos' that were too small to cool and form stars on their own. These existed as static objects around larger galaxies until acted upon by some outside influence. Outflows, which have been observed around a variety of galaxies, can provide this influence in such a way as to collapse, rather than disperse, the minihalo gas. Gray and Scannapieco performed an investigation in which idealized spherically symmetric minihalos were struck by enriched outflows. Here we perform high-resolution cosmological simulations that form realistic minihalos, which we then extract to perform a large suite of simulations of outflow-minihalo interactions including non-equilibrium chemical reactions. In all models, the shocked minihalo forms molecules through non-equilibrium reaction, and then cools to form dense, chemically homogenous clumps of star-forming gas. The formation of these high-redshift clusters may be observable with the next generation of telescopes and the largest of them should survive to the present-day, having properties similar to halo globular clusters.
Authors:
;  [1] ;  [2]
  1. School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287 (United States)
  2. Lawrence Livermore National Laboratory, P.O. Box 808, L-038, Livermore, CA 94550 (United States)
Publication Date:
OSTI Identifier:
22342002
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 778; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABUNDANCE; CHEMICAL REACTIONS; COSMOLOGY; EQUILIBRIUM; GALAXIES; INTERACTIONS; MOLECULES; NONLUMINOUS MATTER; RED SHIFT; RESOLUTION; SIMULATION; SPHERICAL CONFIGURATION; STAR CLUSTERS; STARS; SYMMETRY; TELESCOPES; UNIVERSE