The interaction between jets and clouds in the 3CR galaxies

G. HÄGELE; C. FEINSTEIN; F.D. MACCHETTO; F. MONTERO

Ciudad de Huatulco, México, entre los días 18 y 20 de abril de 2007

Simposio; The Nuclear Region, Host Galaxy and Environment of Active Galaxies: A symposium to celebrate the 60th birthday of Deborah Dultzin-Hacyan; 2007

Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias). E. Benitez, I. Cruz-González and Y. Krongold Eds.

From the HST/WFPC2 3CR Snapshot Survey, data taken with the  filters F555W, F702W and narrow-ramp, a set of galaxies with noticeable  extended structure were selected (e.g. 3C\,79, 3C\,135, 3C\,234, etc). All  of these objects show large regions of [OIII]\,$\lambda$\,5007\AA\ emission  (narrow ramp filter) and the broad-band filters data show similar structures  indicating the presence of strong emission in several lines over these  regions. The morphology observed seems to be related (e.g. same position  angle, direct overlapping or similar shape) with the radio-jet. For some  candidates with these properties GMOS/Gemini spectroscopy was taken. These  data (both HST direct imaging and Gemini spectroscopy) can be tested with  diagnostic diagrams and total UV photons budget to understand the source of  energy that is ionizing the gas. This source of ionization was commonly  believed to be the UV photons emitted by the powerful active galactic  nuclei (AGN), but several of   these objects shows clearly that shocks  produce by the radio jet are the main cause of the observed gas line  emission. We show in this work, the results obtained over some of these  radio-galaxies: 3C\,135, 3C\,180, 3C\,234 and 3C\,284.