Physics
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8299j&link_type=abstract
HST Proposal ID #8299
Physics
Hst Proposal Id #8299 Agn Hosts And Environment
Scientific paper
In quasars and radio galaxies there is a relation between the properties of the radio source and those of the {optical} line-emitting gas. Compact steep-spectrum {CSS} radio sources often show disturbed kinematics of the interstellar gas coupled to associated radio components, providing evidence for gas outflow. The interaction between radio jets and the host galaxy ISM may be responsible for the jet confinement to small scales and can contribute to the ionization of the medium and lead to star formation. Detailed study of the circumnuclear region is essential in understanding the processes that drive the kinematics, physical conditions and morphology of the line emitting gas. The archetypical, nearby {z=0.37} quasar 3C 48 is an unusual CSS radio source with excess far-IR emission, whose one-sided radio jet is aligned with the extended ionized emission and a putative second nucleus {3C 48A}. The radio morphology and our ground based integral field spectroscopy of 3C 48 sugge st the jet is interacting with its immediate environment. 3C 48, because of its high AGN luminosity and proximity, is a good candidate to search for kinematic signatures of the radio jet-gas coupling and/or of a recent interaction. We propose STIS long slit spectroscopy in several slit positions to map the kinematics and physical conditions of the extended emission line gas and their relations to near-nuclear star forming regions found in existing HST images.
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