3C 338 and the evolution of radio galaxies in clusters

Details 3C 338 and the evolution of radio galaxies in clusters 3C 338 and the evolution of radio galaxies in clusters

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...231..327r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 231, no. 2, May 1990, p. 327-332. Research supported by CNRS.

Astronomy and Astrophysics

Astrophysics

11

Galactic Clusters, Galactic Evolution, Radio Galaxies, Intergalactic Media, Magnetohydrodynamic Turbulence, Synchrotron Radiation

Scientific paper

The radio source 3C 338 was observed with the WSRT at 608 MHz in redundancy mode. It was found that six sources are associated with galaxies of the cluster A2199. 3C 338 is typical of sources confined by the intergalactic medium in which evolution is dominated by synchrotron losses. From the knowledge of the radio spectrum, the level of the MHD turbulence in the lobes can be estimated and an upper limit to the diffusion coefficient of the relativistic electrons in the intergalactic medium deduced. It is found that losses due to the diffusion of the relativistic electrons in the intergalactic medium are small compared to radiative losses, as expected when the second Kardashev law is observed. This result agrees with the lack of diffuse emission around 3C 338, as shown by high dynamic range observations.

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