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Date and Time of the Query: 2019-06-17 T03:14:28 PDT
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For refcode 1989ApJ...338...37C:
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Copyright by American Astronomical Society. Reproduced by permission
1989ApJ...338...37C RADIO AND OPTICAL OBSERVATIONS OF OPTICALLY WEAK, STEEP-SPECTRUM, COMPACT RADIO SOURCES W. D. COTTON AND F. N. OWEN National Radio Astronomy Observatory AND M. J. MAHONEY Clark Lake Radio Observatory Received 30 November 1987; accepted 1988 August 11 ABSTRACT The previous interpretation of the radio size and spectrum of several steep-spectrum, compact, optically weak radio sources in terms of a stationary synchrotron model predicted substantially more inverse Compton optical emission than was observed. This paper presents extensive optical and radio observations which reveal a more complex structure than was assumed in the previous analysis. A more conservative analysis suggests that current data are consistent with a standard synchrotron model with relativistic bulk motions not exceeding those needed to explain apparent superluminal motions in other sources. Subject headings: quasars - radiation mechanisms - radio sources: spectra
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