IALP   13078
INSTITUTO DE ASTROFISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
The jet-cloud interaction in 3CR galaxies, preliminary results in four galaxies
Autor/es:
FEINSTEIN, C.; MACCHETTO, F. D.; MONTERO, M. F.; HÄGELE, G. F.
Lugar:
República Cheka, Praga
Reunión:
Simposio; Galaxy Evolution Across the Hubble Time, International Astronomical Union. Symposium no. 235; 2006
Institución organizadora:
International Astronomical Union (IAU)
Resumen:
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 [O III] 5007 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 this 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 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.