Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....85...36s&link_type=abstract
Astronomy and Astrophysics, vol. 85, no. 1-2, May 1980, p. 36-54.
Astronomy and Astrophysics
Astrophysics
60
Energy Transfer, Galactic Structure, Intergalactic Media, Interstellar Magnetic Fields, Radio Astronomy, Radio Galaxies, Astrophysics, Depolarization, Magnetic Field Configurations, Polarization (Waves), Radio Telescopes
Scientific paper
The structure of the two extended outer components of the large double radio source 3C236 has been studied by observations at 6 cm, 21 cm, and 49 cm using the Westbrook Synthesis Radio Telescope. Evidence is found which supports the view that radio components are energized continuously or quasicontinuously throughout their lifetimes; the present secondary components are shown to contain somewhat less than 1% of the minimum energy of the outer lobes. A near-perfect alignment between the nuclear component and outer lobes makes it possible to put stringent limits on the speed of the central galaxy through the surrounding medium. It is noted that the presence of large-scale magnetic fields in giant radio galaxies like 3C236 implies a low upper limit to the mass of the photon.
Strom Richard G.
Willis George A.
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