The evolution of expanding nonthermal sources. I - Nonrelativistic expansion

Details The evolution of expanding nonthermal sources. I - Nonrelativistic expansion The evolution of expanding nonthermal sources. I - Nonrelativistic expansion

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...215..452v&link_type=abstract

Astrophysical Journal, Part 1, vol. 215, July 15, 1977, p. 452-462

Astronomy and Astrophysics

Astronomy

10

Galactic Evolution, Galactic Nuclei, Nonthermal Radiation, Optical Thickness, Radiant Flux Density, Radio Sources (Astronomy), Astronomical Models, Cosmology, Hydrodynamics, Nebulae, Radio Spectra, Time Dependence

Scientific paper

A hydrodynamical treatment of radio source models expanding nonrelativistically into vacuum is presented. Both a linear and a spherical geometry are considered. The time evolution of the flux density is computed for sources which initially are optically thick and upon expansion become optically thin as well as for sources which are initially and at all times optically thin. The spectral evolution is shown also. The results are compared with those for homogeneous models.

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