Magnetic fields and angular momentum in population III star formation

Matthew J. Turk, Jeffrey S. Oishi, Tom Abel, Greg L. Bryan

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

Abstract

We study the buildup of magnetic fields during the formation of Population III star-forming regions, by conducting magnetohydrodynamic cosmological simulations from realistic initial conditions and varying the Jeans resolution. We find that, while compression results in some amplification, turbulent velocity fluctuations driven by the collapse can further amplify an initially weak seed field via dynamo action, provided there is sufficient numerical resolution to capture vortical motions. We explore saturation of amplification of the magnetic field, which could potentially become dynamically important in subsequent, fully-resolved calculations. We have also identified a relatively surprising phenomena that is purely hydrodynamic: the higher-resolved simulations possess substantially different characteristics, suggesting the possibility that disk formation may be suppressed or delayed with increased hydrodynamic resolution.

Original languageEnglish (US)
Title of host publicationFirst Stars IV - From Hayashi to the Future -
Pages77-80
Number of pages4
DOIs
StatePublished - Dec 1 2012
Externally publishedYes
Event1st Stars IV: From Hayashi to the Future - Kyoto, Japan
Duration: May 21 2012May 25 2012

Publication series

NameAIP Conference Proceedings
Volume1480
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other1st Stars IV: From Hayashi to the Future
CountryJapan
CityKyoto
Period5/21/125/25/12

Keywords

  • Magnetic Fields
  • Molecular Hydrogen
  • Population III Stars

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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