Faraday rotation studies of the giant radio galaxy 3C33.1: An evolving naked-jet radio source?

Abstract

In this paper we present results of a detailed morphological and radio polarization study of the nearby radio galaxy 3C33.1 (4C72.01, 0106+729, z = 0.18) made with the Very Large Array at 18 and 21 cm. Recently, this galaxy has been re-classified within a sample of large core-dominated radio sources and it has an exceedingly high projected linear size of ∼450 kpc. The jet shows little Faraday rotation, with rotation measures |RM|<20 rad m⁻², whereas the hotspots exhibit higher values. The low rotation measures indicate that this radio source has a visible jet, which can be a naked jet or stripped from a dense environment. A spectral ageing analysis, based on syncrotron power losses arguments of the integrated spectra, suggest that the radio structure is not younger than 20 Myrs. Further observational properties of this radio galaxy are also discussed.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html