Compact Symmetric Source 4C31.04

Image
Minimum credit line: Image courtesy of NRAO/AUI and Gabriele Giovannini, et al.(for details, see Image Use Policy).

About this Image

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.

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Technical Data

    Telescope VLBA 
    Date of Observation 1992-01-30 
    Type of Observation Continuum Observations 
    Band C 
    Wavelength 6 cm 
    Frequency 5.0 GHz 
    Center of Image RA: 01:19:35.00, Dec: 32:10:50.10 (J2000)  
    Technical Caption  

  • Astronomical database entries for 4C31.04
    • Query NED for images of 4C31.04
    • Query SIMBAD for more 4C31.04 data

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