Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...196..107i&link_type=abstract
Astrophysical Journal, vol. 196, Feb. 15, 1975, pt. 1, p. 107-120.
Astronomy and Astrophysics
Astrophysics
106
Astronomical Models, Cosmic Rays, Galactic Radiation, Magnetohydrodynamic Waves, Plasma-Particle Interactions, Stellar Winds, Cosmic Plasma, Hydrodynamic Equations, Mass Flow, Mass Transfer, Solar Wind, X Ray Sources
Scientific paper
Cosmic rays traveling through a magnetized plasma with mean velocity greater than the Alfven speed can become coupled to the plasma by the emission of magnetohydrodynamic waves. Using a time-independent, spherically symmetric, hydrodynamic treatment, we show that cosmic rays escaping from a galaxy can carry along thermal gas and produce a 'galactic wind'. Solutions indicate that a typical galaxy can lose mass at a rate of about 1 to 10 million solar masses per year and energy at a rate of about 10 to the 40th to 10 to the 42nd ergs per sec. The possible role of galactic winds in radio and X-ray sources is explored. A model is proposed to explain the X-ray emission observed from clusters of galaxies.
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