dc.date.accessioned | 2021-10-09T15:08:42Z | |
dc.date.available | 2021-10-09T15:08:42Z | |
dc.date.created | 2021-10-04T11:46:25Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Severgnini, Paola Braito, Valentina Cicone, Claudia Saracco, P. Vignali, C. Serafinelli, Roberto Della Ceca, R. Dotti, M. Cusano, F. Paris, D. Pruto, G. Zaino, A. Ballo, Lucia Landoni, M. . A possible sub-kiloparsec dual AGN buried behind the galaxy curtain. Astronomy and Astrophysics (A & A). 2021, 646 | |
dc.identifier.uri | http://hdl.handle.net/10852/88852 | |
dc.description.abstract | Although thousands of galaxy mergers are known, only a handful of sub-kiloparsec-scale supermassive black hole (SMBH) pairs have been confirmed so far, leaving a huge gap between the observed and predicted numbers of such objects. In this work, we present a detailed analysis of the Sloan Digital Sky Survey optical spectrum and of near-infrared (NIR) diffraction limited imaging of SDSS J1431+4358. This object is a local radio-quiet type 2 active galactic nucleus (AGN) previously selected as a double AGN candidate on the basis of the double-peaked [OIII] emission line. The NIR adaptive optics-assisted observations were obtained at the Large Binocular Telescope with the LUCI+FLAO camera. We found that most of the prominent optical emission lines are characterized by a double-peaked profile, mainly produced by AGN photoionization. Our spectroscopical analysis disfavors the hypothesis that the double-peaked emission lines in the source are the signatures of outflow kinematics, leaving open the possibility that we are detecting either the rotation of a single narrow-line region or the presence of two SMBHs orbiting around a common central potential. The latter scenario is further supported by the high-spatial resolution NIR imaging: after subtracting the dominant contribution of the stellar bulge component in the host galaxy, we detect two faint nuclear sources at r < 0.5 kpc projected separation. Interestingly, the two sources have a position angle consistent with that defined by the two regions where the [OIII] double peaks most likely originate. Aside from the discovery of a promising sub-kiloparsec scale dual AGN, our analysis shows the importance of an appropriate host galaxy subtraction in order to achieve a reliable estimate of the incidence of dual AGNs at small projected separations. | |
dc.language | EN | |
dc.title | A possible sub-kiloparsec dual AGN buried behind the galaxy curtain | |
dc.type | Journal article | |
dc.creator.author | Severgnini, Paola | |
dc.creator.author | Braito, Valentina | |
dc.creator.author | Cicone, Claudia | |
dc.creator.author | Saracco, P. | |
dc.creator.author | Vignali, C. | |
dc.creator.author | Serafinelli, Roberto | |
dc.creator.author | Della Ceca, R. | |
dc.creator.author | Dotti, M. | |
dc.creator.author | Cusano, F. | |
dc.creator.author | Paris, D. | |
dc.creator.author | Pruto, G. | |
dc.creator.author | Zaino, A. | |
dc.creator.author | Ballo, Lucia | |
dc.creator.author | Landoni, M. | |
cristin.unitcode | 185,15,3,0 | |
cristin.unitname | Institutt for teoretisk astrofysikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |
dc.identifier.cristin | 1942992 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy and Astrophysics (A & A)&rft.volume=646&rft.spage=&rft.date=2021 | |
dc.identifier.jtitle | Astronomy and Astrophysics (A & A) | |
dc.identifier.volume | 646 | |
dc.identifier.pagecount | 10 | |
dc.identifier.doi | https://doi.org/10.1051/0004-6361/202039576 | |
dc.identifier.urn | URN:NBN:no-91473 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0004-6361 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/88852/1/aa39576-20.pdf | |
dc.type.version | PublishedVersion | |
cristin.articleid | A153 | |