Turbulence and small scale dynamo action in population III star formation

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

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

Abstract

We discuss some results from a recent set of magnetohydrodynamic simulations of the formation of the first stars, including cosmological initial conditions and a full treatment of primordial chemistry. These simulations follow the exponential amplification of seed magnetic fields by small-scale dynamo action, and we explore some of the details of the turbulence that leads to this behavior. The key to understanding the growth of magnetic fields is the growth of vorticity, and we focus on its generation and dissipation in simulations of varying resolution. We show that the production and amplification of vorticity changes with increasing resolution, leading to the previous observations of dynamo growth rates and late time field strengths increasing with increased resolution.

Original languageEnglish (US)
Title of host publicationFirst Stars IV - From Hayashi to the Future -
Pages87-90
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
  • Population III Stars

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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