Adiabatic Deceleration of Cosmic Rays near Their Sources

Details Adiabatic Deceleration of Cosmic Rays near Their Sources Adiabatic Deceleration of Cosmic Rays near Their Sources

Aug 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973ap%26ss..23..417w&link_type=abstract

Astrophysics and Space Science, Volume 23, Issue 2, pp.417-424

Astronomy and Astrophysics

Astrophysics

6

Scientific paper

Every plausible source of cosmic rays yields a high flux of cosmic rays near the source. The high flux leads to plasma effects that cause scattering of the cosmic rays, coupling to the interstellar gas and hence to adiabatic deceleration. The cosmic rays are released from the gas only when their pressure has fallen to the cosmic-ray pressure near the Sun multiplied by a factor between 10 and 100. I discuss a model aimed to minimize the deceleration before the cosmic rays are released. The volume which cosmic rays occupy before scattering is maximized by injection into a large but thin disk. Even then, deceleration is reduced only to a factor of two. Such deceleration should cause quasi-supernova remnants somewhat resembling the Cygnus loop but associated with much younger pulsars. Since both the required model and the predicted observations cause difficulties, the problem of adiabatic deceleration remains severe.

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