Instability of the stochastic galactic magnetic field

E. N. Parker, J. Randy Jokipii

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We examine the effects of the stochastic galactic magnetic field on the dynamical instability of the interstellar gas and magnetic field. The large-scale random walk, or meandering, of the magnetic field exerts stresses across the average magnetic field direction, which suppress the growth of perturbations having a small wavelength normal to the field. The result is that, compared with a nonstochastic initial magnetic field, those perturbations, which grow, are significantly broadened in the direction normal to the field. Hence, the instability in a stochastic magnetic field, such as that observed in our Galaxy, should evolve into clouds that are more similar to those that are observed than are those found in the absence of the stochastic field.

Original languageEnglish (US)
Pages (from-to)331-334
Number of pages4
JournalAstrophysical Journal
Volume536
Issue number1 PART 1
StatePublished - Jun 10 2000

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interstellar magnetic fields
magnetic field
magnetic fields
perturbation
interstellar gas
random walk
gas field
galaxies
wavelength
wavelengths

Keywords

  • Instabilities
  • ISM: magnetic fields
  • Turbulence

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Instability of the stochastic galactic magnetic field. / Parker, E. N.; Jokipii, J. Randy.

In: Astrophysical Journal, Vol. 536, No. 1 PART 1, 10.06.2000, p. 331-334.

Research output: Contribution to journalArticle

Parker, EN & Jokipii, JR 2000, 'Instability of the stochastic galactic magnetic field', Astrophysical Journal, vol. 536, no. 1 PART 1, pp. 331-334.
Parker, E. N. ; Jokipii, J. Randy. / Instability of the stochastic galactic magnetic field. In: Astrophysical Journal. 2000 ; Vol. 536, No. 1 PART 1. pp. 331-334.
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