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dc.contributor.authorAxon, Daviden_US
dc.contributor.authorMarconi, Alessandroen_US
dc.contributor.authorCapetti, Alessandroen_US
dc.contributor.authorMacchetto, Duccioen_US
dc.contributor.authorSchreier, Ethanen_US
dc.contributor.authorRobinson, Andrewen_US
dc.identifier.citationAstrophysics and Space Science 248 (1997) 69-77en_US
dc.descriptionRIT community members may access full-text via RIT Libraries licensed databases:
dc.description.abstractWe have obtained HST FOC f/48 long-slit spectroscopy of the inner 4" of the Narrow Line Region of NGC 1068 between 3500-5400A with a spectral resolution of 1.78A/pixel. At a spatial scale of 0.0287" per pixel these data provide an order of magnitude improvement in resolution over previous ground based spectra and allow us to trace the interaction between the radio jet and the gas in the NLR. Our results show that, within +/-0.5" of the radio-jet the emission lines are kinematically disturbed and split into two components whose velocity separation is 1500 km/sec. The filaments associated with the radio lobe also show a redshifted kinematic disturbance of the order of 300 km/sec which probably is a consequence of the expansion of the radio plasma. Furthermore, the material enveloping the radio-jet is in a much higher ionization state than that of the surrounding NLR gas. The highest excitation is coincident with the jet axis where emission in the coronal line of [FeVII] 3769A is detected and the HeII 4686A is strong but where [OII] 3727A is depressed. This large localized increase in ionization on the jet axis is accompanied by the presence of an excess continuum. Because the electron density is substantially larger in the jet compared to the surrounding NLR, these results can only be explained if there is a more intense ionizing continuum associated with the jet. This can be accomplished in a variety of ways which include an intrinsically anisotropic nuclear radiation field, a reduced gas covering factor or the presence of a local ionization source. The morphology, kinematics and, possibly, the ionization structure of the NLR in the vicinity of the jet of NGC 1068 are a direct consequence of the interaction with the radio outflow. (Refer to PDF file for exact formulas).en_US
dc.description.sponsorshipBased on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS 5-26555 and by STScI [Space Telescope Science Institute] grant GO-3594.01-91Aen_US
dc.format.extent361195 bytesen_US
dc.publisherSpringer Netherlands: Astrophysics and Space Scienceen_US
dc.relation.ispartofseriesvol. 248en_US
dc.relation.ispartofseriesno. 1-2en_US
dc.relation.ispartofseriespps. 69-77en_US
dc.subjectGalaxies-individual (NGC1068)en_US
dc.titleJet driven motions in the Narrow Line region of NGC1068en_US

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