Electromagnetic instability of partially overlapping flows in the interstellar medium

Details Electromagnetic instability of partially overlapping flows in the interstellar medium Electromagnetic instability of partially overlapping flows in the interstellar medium

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ap.....49..543b&link_type=abstract

Astrophysics, Volume 49, Issue 4, pp.543-554

Astronomy and Astrophysics

Astrophysics

Ism, Electromagnetic Instability, Flow, Spiral Galaxies, Velocity Distribution

Scientific paper

The stability of the charged particle velocity distributions resulting from intermixing of neighboring flows of interstellar medium are examined, in particular, within the confines of spiral galaxies. It is shown for a specific example that the customary electrostatic instability shows up when the difference in the systematic velocities of both flows is sufficiently large compared to the thermal speed. On the other hand, the electromagnetic instability occurs, in principle, for an arbitrarily small difference in the flow velocities. The characteristic time for this instability to develop is much longer than for the electrostatic instability, but is still short compared to the ordinary evolution time for the interstellar medium.

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