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High spatial resolution of the mid-infrared emission of the Compton-thick type 2 Seyfert galaxy, Markarian 3
dc.contributor.author | Sales, Dinalva Aires de | pt_BR |
dc.contributor.author | Dutra, Daniel Ruschel | pt_BR |
dc.contributor.author | Pastoriza, Miriani Griselda | pt_BR |
dc.contributor.author | Riffel, Rogério | pt_BR |
dc.contributor.author | Winge, Claudia | pt_BR |
dc.date.accessioned | 2014-09-19T02:14:31Z | pt_BR |
dc.date.issued | 2014 | pt_BR |
dc.identifier.issn | 0035-8711 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/103451 | pt_BR |
dc.description.abstract | The mid-infrared (MIR) spectra observed with Gemini/Michelle have been used to study the nuclear region of the Compton-thick type 2 Seyfert galaxy, Markarian 3 (Mrk 3), at a spatial resolution of ∼200 pc. No polycyclic aromatic hydrocarbon emission bands were detected in the N-band spectrum of Mrk 3. However, intense [Ar III] 8.99 μm, [S IV] 10.5 μm and [Ne II] 12.8 μm ionic emission lines, as well as a silicate absorption feature at 9.7 μm, have been found in the nuclear extraction (∼200 pc). We also present a subarcsecond-resolution Michelle N-band image of Mrk 3, which resolves its circumnuclear region. This diffuse MIR emission shows up as a wing towards the east–west direction, closely aligned with the Sshape of the narrow-line region observed in the optical [O III] λ5007Å image from the Faint Object Camera onboard the Hubble Space Telescope. The nuclear continuum spectrum can be well represented by a theoretical torus spectral energy distribution, suggesting that the nucleus of Mrk 3 might host a dusty toroidal structure, as predicted by the unified model of an active galactic nucleus (AGN). In addition, the hydrogen column density (NH = 4.8+3.3 −3.1 × 1023 cm-²) estimated with a torus model for Mrk 3 is consistent with the value derived from X-ray spectroscopy. The torus model geometry of Mrk 3 is similar to that of NGC 3281 (both are Compton-thick galaxies), confirmed through fitting the 9.7-μm silicate band profile. These results might provide further evidence that silicate-rich dust can be associated with the AGN torus and might also be responsible for the absorption observed at X-ray wavelengths in those galaxies. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Monthly notices of the Royal Astronomical Society. Oxford. Vol. 441, no. 1 (June 2014), p. 630-639 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Techniques: spectroscopic | en |
dc.subject | Nucleo galatico | pt_BR |
dc.subject | Dust, extinction | en |
dc.subject | Galaxias seyfert | pt_BR |
dc.subject | ISM: molecules | en |
dc.subject | Galaxies: individual: markarian 3 | en |
dc.subject | Galaxies: seyfert | en |
dc.subject | Infrared: ISM | en |
dc.title | High spatial resolution of the mid-infrared emission of the Compton-thick type 2 Seyfert galaxy, Markarian 3 | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000921582 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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