Compact Symmetric Source 4C31.04 |
 | Minimum credit line: Image courtesy of NRAO/AUI
and Gabriele Giovannini, et al.(for details, see .
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Compact Symmetric Sources (CSOs) are small sources with lobe
emission on both sides of an active core. They are very similar
to classical extended radio sources but have a much smaller
linear size, less than 1 kiloparsec. The study of these objects
is particularly interesting because the CSO properties are related
to the young source ages, 10,000 to 100,000 years. Unifying
evolutionary models have been proposed whereby CSOs evolve into
CSS (Compact Steep Spectrum) sources and then into Fanaroff-Riley
type II galaxies or possibly Fanaroff-Riley type I radio galaxies.
4C31.04 is a nearby CSO (at a redshift z = 0.0592) with a faint
central core and a flat spectrum and two extended lobes. Investigator(s): Gabriele Giovannini, et al. This image is available in the following downloadable versions: If you would like to obtain a higher resolution version of this image,
please contact .
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Telescope
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VLBA
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Date of Observation
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1992-01-30
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Type of Observation
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Continuum Observations
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Band
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C
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Wavelength
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6 cm
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Frequency
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5.0 GHz
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Center of Image
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RA: 01:19:35.00, Dec: 32:10:50.10 (J2000)
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Technical Caption
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