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dc.contributor.authorMenezes, R.B.
dc.contributor.authorSilva, Patrícia da
dc.contributor.authorSteiner, J.E.
dc.date.accessioned2024-10-15T21:36:51Z
dc.date.available2024-10-15T21:36:51Z
dc.date.issued2021
dc.identifier.issn0035-8711
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85105181404&doi=10.1093%2fmnras%2fstab478&partnerID=40&md5=02b303d5a876e77d0b38cdefc33d93a5
dc.identifier.urihttps://repositorio.maua.br/handle/MAUA/1380
dc.description.abstractWe present the analysis of an optical data cube of the central region of NGC 1448, obtained with the Multi Unit Spectroscopic Explorer (MUSE). Chandra X-ray data indicate that the active galactic nucleus (AGN) is not located at the apparent stellar nucleus of the galaxy, but at a projected distance of 1.75, ±, 0.22 arcsec (139 ± 17 pc). This is probably caused by the high interstellar extinction in the surroundings of the AGN, which corresponds to the true nucleus of the galaxy, as also proposed by previous studies. The morphology and classification of the optical line-emitting regions indicate two ionization cones, around an axis with a position angle of PAcones =-50° ± 7°, with emission-line spectra characteristic of Seyfert galaxies. The stellar and gas kinematics are consistent with a stellar and gas rotating disc around the nucleus, with a velocity amplitude of 125 km s-1. Two probable outflows from the AGN were detected along the region of the two ionization cones. The AGN position does not coincide with the brightest line-emitting region at the centre of NGC 1448. That may be a consequence of the high obscuration from the AGN towards the observer (the AGN is actually Compton thick), mostly caused by a nearly edge-on torus. An additional hypothesis is that the AGN reduced its luminosity, during the last 440 yr, to nearly half of the value in the past. In this case, the brightest line-emitting region corresponds to a 'light echo' or a 'fossil' of the AGN in the past. © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.en
dc.languageInglêspt_BR
dc.publisherOxford University Pressen
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsAcesso Aberto
dc.sourceScopusen
dc.subjectgalaxies: activeen
dc.subjectgalaxies: individual: NGC 1448en
dc.subjectgalaxies: nucleien
dc.subjectgalaxies: Seyferten
dc.subjecttechniques: imaging spectroscopyen
dc.subjectActive Galactic Nucleien
dc.subjectIonization of gasesen
dc.subjectStarsen
dc.subjectActive galactic nucleien
dc.subjectBright linesen
dc.subjectGalaxies activeen
dc.subjectGalaxies: individual: NGC 1448en
dc.subjectGalaxies:Nucleien
dc.subjectGalaxy:seyferten
dc.subjectMulti-uniten
dc.subjectSeyfertsen
dc.subjectStellarsen
dc.subjectTechniques: imaging spectroscopiesen
dc.subjectSpectroscopic analysisen
dc.titleThe highly obscured Seyfert 2 nucleus in NGC 1448 observed with MUSEen
dc.typeArtigo de Periódicopt_BR
dc.identifier.doi10.1093/mnras/stab478
dc.description.affiliationInstituto Mauá de Tecnologia, Praça Mauá 1, São Caetano do Sul, SP, 09580-900, Brazil
dc.description.affiliationInstituto de Astronomia, Geofísica e Ciências Atmosféricas, Departamento de Astronomia, Universidade de São Paulo, São Paulo, SP, 05508-090, Brazil
dc.identifier.scopus2-s2.0-85105181404
dc.citation.issue1
dc.citation.epage141
dc.citation.spage124
dc.citation.volume503


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