Probing the Kinematics of the Narrow-Line Region in Seyfert Galaxies with Slitless Spectroscopy

Details Probing the Kinematics of the Narrow-Line Region in Seyfert Galaxies with Slitless Spectroscopy Probing the Kinematics of the Narrow-Line Region in Seyfert Galaxies with Slitless Spectroscopy

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8340c&link_type=abstract

HST Proposal ID #8340

Physics

Hst Proposal Id #8340 Agn Physics

Scientific paper

Studies of the gas kinematics of the narrow-line regions {NLRs} in Seyfert galaxies indicate complex velocity fields, with evidence for both gravitational and non-gravitational forces. Determining the relative importance of these dynamical effects as a function of position will shed light on: 1} the mass of the putative supermassive black hole {SMBH}, 2} the interaction of jets and/or outflowing winds with the NLR gas, and 3} the fueling of the active nucleus from gas in the NLR and surrounding galaxy. Slitless spectroscopy with STIS is an exciting new technique, which will allow us to determine the velocity field of the entire NLR in a single orbit. We will obtain slitless G430M spectra of the extended O III Lambda5007 emission in 14 Seyfert galaxies, at a spectral resolution of Lambda/DeltaLambda 10, 000 and a spatial resolution of 0"point1 - 0"point2. A survey of this size is necessary to investigate the relationship between the kinematics and other properties, includ in g morphology of the NLR, orientation effects, prominence of radio jets, and extranuclear characteristics. Based on our experience with STIS slitless spectra of NGC 4151, we have selected targets that show prominent O III knots of emission, to ensure the success of this technique and to complement observations of compact or smooth NLRs that require a long slit.

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