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Il Nuovo Cimento B (1971-1996)

, Volume 106, Issue 8, pp 909–925 | Cite as

Cosmic-ray-driven galactic wind

  • H. Fichtner
  • H. J. Fahr
  • W. Neutsch
  • R. Schlickeiser
  • A. Crusius-Wätzel
  • H. Lesch
Article

Summary

A simple one-dimensional Cartesian solution of the magnetohydrodynamic equations describing the global motion of interstellar matter including the effects of cosmic-ray and magnetic-field pressure is presented. First an adiabatic equation of state for the thermal background plasma and a loss-free cosmic-ray gas in the strong-scattering limit is considered. In this case only one type of flow is consistent with the physical constraints: a subsonic wind at the base which accelerates for all values of galactic height (z) but never becomes supersonic. Second, a nonadiabatic interstellar gas is discussed. Including additional heating causes an acceleration to higher velocities. The presented solutions can be used to model halo components of interstellar matter with large-scale heights.

PACS 98.40

Interstellar matter and nebulae PACS 96.40 Cosmic rays 

PACS 52.30

Plasma flow magnetohydrodynamics 

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Copyright information

© Società Italiana di Fisica 1991

Authors and Affiliations

  • H. Fichtner
    • 1
  • H. J. Fahr
    • 1
  • W. Neutsch
    • 1
  • R. Schlickeiser
    • 2
  • A. Crusius-Wätzel
    • 2
  • H. Lesch
    • 3
  1. 1.Institut für Astrophysik und Extraterrestrische Forschung der Universität BonnBonn 1Deutchland
  2. 2.Max-Planck-Institut für RadioastronomieBonn 1Deutchland
  3. 3.Landessternwarte KönigstuhlHeidelberg 1Deutchland

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