Towards forming a primordial protostar in a cosmological AMR simulation

Matthew J. Turk, Tom Abel, Brian W. O'Shea

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Modeling the formation of the first stars in the universe is a well-posed problem and ideally suited for computational investigation.We have conducted high-resolution numerical studies of the formation of primordial stars. Beginning with primordial initial conditions appropriate for a ΛCDM model, we used the Eulerian adaptive mesh refinement code (Enzo) to achieve unprecedented numerical resolution, resolving cosmological scales as well as sub-stellar scales simultaneously. Building on the work of Abel, Bryan and Norman (2002), we followed the evolution of the first collapsing cloud until molecular hydrogen is optically thick to cooling radiation. In addition, the calculations account for the process of collision-induced emission (CIE) and add approximations to the optical depth in both molecular hydrogen roto-vibrational cooling and CIE. Also considered are the effects of chemical heating/cooling from the formation/destruction of molecular hydrogen. We present the results of these simulations, showing the formation of a 10 Jupiter-mass protostellar core bounded by a strongly aspherical accretion shock. Accretion rates are found to be as high as one solar mass per year.

Original languageEnglish (US)
Title of host publicationFirst Stars III
Pages16-20
Number of pages5
DOIs
StatePublished - Apr 28 2008
Externally publishedYes
EventFirst Stars III - Santa Fe, NM, United States
Duration: Jul 15 2007Jul 20 2007

Publication series

NameAIP Conference Proceedings
Volume990
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherFirst Stars III
CountryUnited States
CitySanta Fe, NM
Period7/15/077/20/07

Keywords

  • Population III stars
  • Star formation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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