Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-12-22
Astronomy and Astrophysics
Astrophysics
16 pages, 8 .ps figures, accepted by Astronomy and Astrophysics Main Journal
Scientific paper
Two frequency observations, mainly at 1.4 and 5 GHz from the VLA, have been used to study spectral variations along the lobes of some nearby low luminosity radio galaxies that constitute a representative sample selected from the B2 catalogue. The variations of the spectral index have been interpreted as being due to synchrotron and inverse Compton losses and characteristic spectral ages are deduced for the relativistic electrons. The radiative ages are in the range of several 10^7 years. These ages correlate well with the source sizes. They also appear to be consistent with dynamical ages determined from ram-pressure arguments, if we make reasonable assumptions about the ambient gas density and allow for very moderate deviations from the equipartition conditions. There appears to be a significant difference between the radiative ages of sources in our sample and those of more powerful 3CR radio sources. We briefly discuss the possibility of re-acceleration processes and indicate some objects where these may occur.
Capetti Alessandro
de Ruiter Hans R.
Fanti Roberto
Morganti Rafaella
Murgia Mariella
No associations
LandOfFree
Radiative ages in a representative sample of low luminosity radio galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Radiative ages in a representative sample of low luminosity radio galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radiative ages in a representative sample of low luminosity radio galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-16849