Other
Scientific paper
Jun 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...222..435s&link_type=abstract
Astrophysical Journal, Part 1, vol. 222, June 1, 1978, p. 435-439, 441, 443 (5 ff.).
Other
50
Astronomical Photography, Astronomical Photometry, Galactic Radiation, Light Emission, Polarimetry, Radio Galaxies, Compton Effect, Interstellar Gas, Isophotes, Optical Polarization, Radiation Distribution, Relativistic Particles, Synchrotron Radiation
Scientific paper
Photographic and photometric evidence for optical emission in the radio lobes of 3C 285, 3C 265, and 3C 390.3 is presented. The optical luminosity of this emission lies between B near 26 and B near 22 mag/square arc sec. Possible mechanisms of optical emission and their implications for models of radio galaxies are discussed. If the optical radiation arises from inverse Compton scattering of the blackbody background radiation, it provides a fairly direct method for measuring the magnetic fields in radio galaxies. For simple models, such fields would be below the equipartition value. If, on the other hand, the optical radiation is the visible extension of the radio synchrotron, it sets strong limits on the lifetimes of the relativistic electrons which must be regenerated in the extended source. Several of the emission regions for optical polarization are examined in order to help distinguish among these possibilities.
Crane Patrick
Saslaw William C.
Tyson Anthony J.
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