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dc.contributor.authorMüller, Allan Schnorrpt_BR
dc.contributor.authorStorchi-Bergmann, Thaisapt_BR
dc.contributor.authorNagar, Neil M.pt_BR
dc.contributor.authorFerrari, Fabriciopt_BR
dc.date.accessioned2014-09-19T02:14:28Zpt_BR
dc.date.issued2014pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/103446pt_BR
dc.description.abstractWe present two-dimensional stellar and gaseous kinematics of the inner 0.8 × 1.1 kpc² of the LINER/Seyfert 1 galaxy NGC 7213, from optical spectra obtained with the Gemini Multi- Object Spectrograph integral field spectrograph on the Gemini South telescope at a spatial resolution of ≈ 60 pc. The stellar kinematics shows an average velocity dispersion of 177 km s-ˡ, circular rotation with a projected velocity amplitude of 50 km s-ˡ and a kinematic major axis at a position angle of ≈−4º (west of north). From the average velocity dispersion we estimate a black hole mass of MBH = 8 +16 −6 ×107Mʘ. The gas kinematics is dominated by non-circular motions, mainly along two spiral arms extending from the nucleus out to ≈4 arcsec (280 pc) to the NW and SE, that are cospatial with a nuclear dusty spiral seen in a structure map of the nuclear region of the galaxy. The projected gas velocities along the spiral arms show blueshifts in the far side and redshifts in the near side, with values of up to 200 km s-ˡ. This kinematics can be interpreted as gas inflows towards the nucleus along the spiral arms if the gas is in the plane of the galaxy. We estimate the mass inflow rate using two different methods. The first is based of the observed velocities and geometry of the flow, and gives a mass inflow rate in the ionized gas of ≈7 × 10-²Mʘyr-ˡ. In the second method, we calculate the net ionized gas mass flow rate through concentric circles of decreasing radii around the nucleus resulting in mass inflow rates ranging from ≈0.4M yr-ˡ at 300 pc down to ≈0.2M yr-ˡ at 100 pc from the nucleus. These rates are larger than necessary to power the active nucleus.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the Royal Astronomical Society. Oxford. Vol. 438, no. 4 (Mar. 2014), p. 3322-3331pt_BR
dc.rightsOpen Accessen
dc.subjectGalaxies: activeen
dc.subjectGaláxias ativaspt_BR
dc.subjectGalaxias seyfertpt_BR
dc.subjectGalaxies: individual: NGC 7213en
dc.subjectGalaxies: kinematics and dynamicsen
dc.subjectNucleo galaticopt_BR
dc.subjectCinemáticapt_BR
dc.subjectGalaxies: nucleien
dc.subjectgalaxies: seyferten
dc.titleGas inflows towards the nucleus of the active galaxy NGC 7213pt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000921420pt_BR
dc.type.originEstrangeiropt_BR


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