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dc.contributor.authorBarbosa, Fausto Kuhn Berenguerpt_BR
dc.contributor.authorStorchi-Bergmann, Thaisapt_BR
dc.contributor.authorFernandes Junior, Roberto Cidpt_BR
dc.contributor.authorWinge, Claudiapt_BR
dc.contributor.authorSchmitt, Henrique Robertopt_BR
dc.date.accessioned2014-04-08T01:49:59Zpt_BR
dc.date.issued2009pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/90452pt_BR
dc.description.abstractWe present two-dimensional (2D) mapping of the gas velocity field of the inner few hundred parsecs of six nearby active galaxies, using spectra obtained with the integral field unit of the Gemini Multi-Object Spectrograph instrument at the Gemini North telescope. In our previous paper, we reported the 2D mapping of the stellar kinematics extracted from the calcium triplet absorption lines. In this paper, we use the [S III] λ9069 emission line to obtain the flux distribution and kinematics of the gas in the narrow-line region (NLR). The gas emission is extended by a few hundred parsecs and its kinematics are dominated by rotation in the galaxy plane. Subtraction of the rotation component reveals outflows along the NLR which show spatial correlation with radio structures seen in Very Large Array radio 3.6 and 20 cm flux images, suggesting that the radio jet is pushing the circumnuclear interstellar medium. This interpretation is also supported by the observation of high-velocity dispersion (σ ≥ 500 km s-ˡ) structures in association with the outflowing gas. The gas outflows and radio jets are oriented at random angles relative to the galaxy major axis, indicating that they are not launched perpendicularly to the galaxy plane. Slicing the emission-line profiles into velocity channels, we create maps of the NLR gas distribution at different radial velocities. In at least half of our sample, the highest velocities are observed close to the nucleus suggesting that the emitting gas is decelerating outwards, from projected blueshifts exceeding 400 km s-ˡ to values of 100–200 km s-ˡ at 100–200 pc from the nucleus. We have estimated mass outflow rates in the NLR of ≈1 to 50 × 10-³Mʘ yr-ˡ, which are ≈10–20 times the accretion rate necessary to feed the active nucleus. The kinetic energy of the ouflow is estimated to be 4–5 orders of magnitude smaller than the bolometric luminosity. Assuming kinetic energy transfer between the radio jet and the NLR outflows, the mass ejection rate in the radio jet is 5–6 orders of magnitude smaller than the mass accretion rate necessary to feed the nuclear supermassive black hole.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the royal astronomical society. Oxford. Vol. 396, no. 1 (Jun. 2009), p. 2-18pt_BR
dc.rightsOpen Accessen
dc.subjectGaláxias ativaspt_BR
dc.subjectGalaxies: activeen
dc.subjectNucleo galaticopt_BR
dc.subjectGalaxies: kinematics and dynamicsen
dc.subjectGalaxias seyfertpt_BR
dc.subjectGalaxies: nucleien
dc.subjectGalaxies: Seyferten
dc.subjectCinemáticapt_BR
dc.subjectEspectroscopiapt_BR
dc.subjectHubble space telescopept_BR
dc.titleGemini/GMOS IFU gas velocity 'tomography' of the narrow line region of nearby active galaxiespt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000704982pt_BR
dc.type.originEstrangeiropt_BR


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