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GLOBULAR CLUSTER FORMATION WITHIN A COSMOLOGICAL CONTEXT

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Aaron C. Boley, George Lake, Justin Read and Romain Teyssier

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We place constraints on the formation redshifts for blue globular clusters (BGCs), independent of the details of hydrodynamics and population III star formation. The observed radial distribution of BGCs in the Milky Way Galaxy suggests that they formed in biased dark matter halos at high redshift. As a result, simulations of a ~1 Mpc box up to z ~ 10 must resolve BGC formation in ΛCDM. We find that most halo stars could be produced from destroyed BGCs and other low-mass clusters that formed at high redshift. We present a proof-of-concept simulation that captures the formation of globular-like star clusters.


Keywords

early universe; galaxies: star clusters; globular clusters: general


PACS

98.20.Gm Globular clusters in the Milky Way

98.80.Cq Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)

98.62.Py Distances, redshifts, radial velocities; spatial distribution of galaxies

95.35.+d Dark matter (stellar, interstellar, galactic, and cosmological)

98.35.Gi Galactic halo

97.20.Wt Population III stars

Subjects

Gravitation and cosmology

Particle physics and field theory

Astrophysics and astroparticles

Dates

Issue 1 (2009 November 20)

Received 2009 August 9, accepted for publication 2009 October 20

Published 2009 November 6



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