The relationship between the radio and infrared luminosities of 3CR radio galaxies

Details The relationship between the radio and infrared luminosities of 3CR radio galaxies The relationship between the radio and infrared luminosities of 3CR radio galaxies

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.221..311y&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 221, July 15, 1986, p. 311-317.

Astronomy and Astrophysics

Astronomy

19

Galactic Radiation, Infrared Astronomy, Luminosity, Radio Galaxies, Magnitude, Red Shift, Statistical Correlation, Stellar Evolution

Scientific paper

High-redshift (z of greater than 1) 3CR radio galaxies are known to be brighter in the infrared than their low-redshift counterparts; this has been interpreted as being entirely due to the evolution of their constituent stellar populations. There is, however, a great difference between the radio luminosities of the high-redshift and low-redshift galaxies; the possibility of a correlation between the infrared and radio luminosities of these objects is therefore examined statistically. It is shown that there is in fact a positive correlation between these two parameters for the most radio-luminous galaxies; the 3CR radio galaxies are not simply evolving standard candles. It is argued that the observed infrared luminosities of the most powerful radio galaxies are attributable to a combination of this correlation and the evolution of their stellar populations. It is further suggested that the correlation is caused by the most powerful radio galaxies occurring in dense cluster environments where their stellar luminosities are increased by cannibalism.

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