The radio structure of the narrow-line Seyfert 1 Mrk 783 with VLBA and e-MERLIN

dc.contributorAalto Universityen
dc.contributor.authorCongiu, E.en_US
dc.contributor.authorKharb, P.en_US
dc.contributor.authorTarchi, A.en_US
dc.contributor.authorBerton, M.en_US
dc.contributor.authorCaccianiga, A.en_US
dc.contributor.authorChen, S.en_US
dc.contributor.authorCrepaldi, L.en_US
dc.contributor.authorDi Mille, F.en_US
dc.contributor.authorJärvelä, E.en_US
dc.contributor.authorJarvis, M. E.en_US
dc.contributor.authorla Mura, G.en_US
dc.contributor.authorVietri, A.en_US
dc.contributor.departmentUniversidad de Chileen_US
dc.contributor.departmentTata Institute of Fundamental Researchen_US
dc.contributor.departmentNational Institute for Astrophysics (INAF)en_US
dc.contributor.departmentMetsähovi Radio Observatoryen_US
dc.contributor.departmentIstituto Nazionale di Astrofisica (INAF)en_US
dc.contributor.departmentTechnion-Israel Institute of Technologyen_US
dc.contributor.departmentUniversity of Padovaen_US
dc.contributor.departmentCarnegie Institution of Washingtonen_US
dc.contributor.departmentEuropean Space Astronomy Centreen_US
dc.contributor.departmentMax-Planck-Institut für Astrophysiken_US
dc.description.abstractIn this paper, we present the analysis of new radio and optical observations of the narrow-line Seyfert 1 galaxy Mrk 783. 1.6 GHz observations performed with the e-MERLIN interferometer confirm the presence of the diffuse emission previously observed. The Very Long Baseline Array (VLBA) also detects the nuclear source both at 1.6 GHz (L band) and 5 GHz (C band). While the L-band image shows only an unresolved core, the C-band image shows the presence of a partially resolved structure at a position angle of 60◦. The brightness temperature of the emission in both bands (>106 K) suggests that it is a pc-scale jet produced by the active galactic nucleus. The relatively steep VLBA spectral index (αVLBA = 0.63 ± 0.03) is consistent with the presence of optically thin emission on milliarcsecond scales. Finally, we investigated two possible scenarios that can result in the misalignment between the kpc and pc-scale radio structure detected in the galaxy. We also analysed the optical morphology of the galaxy, which suggests that Mrk 783 underwent a merging in relatively recent times.en
dc.description.versionPeer revieweden
dc.identifier.citationCongiu , E , Kharb , P , Tarchi , A , Berton , M , Caccianiga , A , Chen , S , Crepaldi , L , Di Mille , F , Järvelä , E , Jarvis , M E , la Mura , G & Vietri , A 2020 , ' The radio structure of the narrow-line Seyfert 1 Mrk 783 with VLBA and e-MERLIN ' , Monthly Notices of the Royal Astronomical Society , vol. 499 , no. 3 , pp. 3149-3157 .
dc.identifier.otherPURE UUID: 26df7193-5a46-429c-ad1f-dcbd4ddef17een_US
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dc.relation.ispartofseriesMonthly Notices of the Royal Astronomical Societyen
dc.relation.ispartofseriesVolume 499, issue 3en
dc.subject.keywordGalaxies: individual: Mrk 783en_US
dc.subject.keywordGalaxies: Seyferten_US
dc.subject.keywordRadio continuum: galaxiesen_US
dc.titleThe radio structure of the narrow-line Seyfert 1 Mrk 783 with VLBA and e-MERLINen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi