Cosmic-ray-driven galactic wind.

Details Cosmic-ray-driven galactic wind. Cosmic-ray-driven galactic wind.

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ncimb.106..909f&link_type=abstract

Nuovo Cimento B, Vol. 106, No. 8, p. 909 - 925

Physics

2

Scientific paper

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.

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