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Astronomy Colloquium: "Cosmic Rays and Their Role in Galaxies" - Ellen Zweibel, University of Wisconsin

SpeakerEllen Zweibel, University of Wisconsin
Date Apr 22, 2014
Time 3:45 pm  
Location Astronomy 134
Sponsor Department of Astronomy
Event type Seminar/Symposium
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Cosmic rays comprise only about a billionth of interstellar particles by number, but they carry as much energy as the thermal particles. Except for very rare direct collisions, their interaction with the interstellar medium is entirely mediated  by the galactic magnetic field. This interaction exchanges energy and momentum between the background medium and the cosmic rays, can heat the interstellar gas, and can drive a galactic wind.

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