Physics
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8253w&link_type=abstract
HST Proposal ID #8253
Physics
Hst Proposal Id #8253 Agn Physics
Scientific paper
Recent progress in understanding the kinematics of the Narrow Line Region {NLR} in Seyfert galaxies has identified three distinct components -- a high velocity nuclear flow, a more widespread gravitational component, and a jet-accelerated component. In this proposal, we aim to isolate and study the jet-accelerated component. A ground based long-slit survey shows that the kinematic signature of jet interactions while detectable, is usually confused by the presence of the other two components. Higher spatial resolution is essential if we are to isolate the jet-perturbed gas. We have selected 7 Seyferts with linear {jet-like} radio structure, pre-existing HST emission line images, and some indication {kinematic and/or morphological} of a jet perturbed component. Using STIS, we will obtain one {or in some cases, two} long slit exposures of the OIII Lambda5007, taken along the radio axis and through the brighter emission features. This will allow us to zero in on the jet-acce lerated gas -- isolating and mea suring its strength, location, and velocity field, all of which can be used to test the nature of the jet-gas interaction. In some objects we will also obtain a short G430L exposure to study the excitation conditions in the jet. In the big picture, jet interactions are an important and widespread astrophysical phenomenon. Unlike other contexts, the pervasive distribution of line emitting gas in Seyfert nuclei provides the perfect `highlight' with which to study this interaction.
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