Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976sval....2...95s&link_type=abstract
(Pis'ma v Astronomicheskii Zhurnal, vol. 2, May 1976, p. 244-247.) Soviet Astronomy Letters, vol. 2, May-June 1976, p. 95, 96. T
Astronomy and Astrophysics
Astronomy
1
Radiant Flux Density, Radio Sources (Astronomy), Supernova Remnants, Energy Conservation, Magnetic Fields, Radio Spectra, Relativistic Particles, Stellar Envelopes
Scientific paper
A hypothesis is put forward and justified that the total energy of relativistic particles and magnetic fields generated during the 'convective' stage of the evolution of shells expelled in the explosions is conserved during the expansion of supernova remnants. This assumption easily explains the observed dependence of the mean surface radio brightness of a source on the inverse fourth power of its linear diameter. The evolution of the radio spectrum of Cassiopeia A is explained by a continuous generation of relativistic particles in the convective zone of this remnant.
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