Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...309..100s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 309, Oct. 1, 1986, p. 100-109.
Astronomy and Astrophysics
Astrophysics
4
Astronomical Spectroscopy, Emission Spectra, Optical Emission Spectroscopy, Radio Galaxies, Astronomical Photometry, Radio Emission, Synchrotron Radiation
Scientific paper
Optical spectra and broad-band photometry of the optical counterpart of the southwest radio lobe of the double-lobed radio galaxy 3C 33 are described. The optical emission comes from at least two distinct regions. In the red, most of the flux comes from the hot spot; in the blue, most comes from regions outside the hot spot. The spectrum of the hot spot itself is consistent with optical synchrotron emission with a high frequency turnover from the radio spectrum above 2 x 10 to the 13th Hz and maximum electron energy corresponding to a critical frequency of 10 to the 14th Hz. The features are difficult to explain in terms of either common emission line processes or commonly accepted continuum emission mechanisms.
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