Dying Radio Galaxies in Cluster

1
Dying Radio Galaxies in Clusters. M. Murgia, P.
Parma, H.R. de Ruiter, K.-H. Mack, R. Fanti
(Istituto di Radioastronomia, Bologna)
Average spectral indices of the various
components in 1.4 GHz VLA images. Contours (and
for clarity also colors) represent brightness.
Zones with steep spectra (agt1.5) indicate relic
lobes