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http://hdl.handle.net/20.500.12386/32400
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Marinucci, A. | en_US |
dc.contributor.author | BIANCHI, SIMONE | en_US |
dc.contributor.author | BRAITO, Valentina | en_US |
dc.contributor.author | De Marco, B. | en_US |
dc.contributor.author | Matt, G. | en_US |
dc.contributor.author | Middei, R. | en_US |
dc.contributor.author | NARDINI, EMANUELE | en_US |
dc.contributor.author | Reeves, J. N. | en_US |
dc.date.accessioned | 2022-06-17T13:50:25Z | - |
dc.date.available | 2022-06-17T13:50:25Z | - |
dc.date.issued | 2020 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/32400 | - |
dc.description.abstract | We report on one of the brightest flux levels of the Seyfert 2 galaxy NGC 2992 ever observed in X-rays, on 2019 May. The source has been monitored every few days from 2019 March 26 to 2019 December 14 by Swift-X-Ray Telescope (XRT), and simultaneous XMM-Newton (250 ks) and NuSTAR (120 ks) observations were triggered on 2019 May 6. The high count rate of the source (its 2-10 keV flux ranged between 0.7 and 1.0 × 10<SUP>-10</SUP> erg cm<SUP>-2</SUP> s<SUP>-1</SUP>) allows us to perform a time-resolved spectroscopy, probing spatial scales of tens of gravitational radii from the central black hole. By constructing a map of the excess emission over the primary continuum, we find several emission structures in the 5.0-7.2 keV energy band. From fitting the 50 European Photon Imaging Camera (EPIC)-pn spectral slices of ∼5 ks duration, we interpret them as a constant narrow iron Kα line and three variable components in the iron K complex. When a self-consistent model accounting for the accretion disc emission is considered (KYNRLINE), two of these features (in the 5.0-5.8 and 6.8-7.2 keV bands) can be ascribed to a flaring region of the accretion disc located at r<SUB>in</SUB> ≃ 15-40r<SUB>g</SUB> from the black hole. The third one (6.5-6.8 keV) is likely produced at much larger radii (r<SUB>in</SUB> > 50r<SUB>g</SUB>). The inner radius and the azimuthal extension retrieved from the co-added spectra of the flaring states are r<SUB>in</SUB> = 15 ± 3r<SUB>g</SUB> and ϕ = 165°-330°, suggesting that the emitting region responsible for the broad iron K component is a relatively compact annular sector within the disc. Our findings support a physical scenario in which the accretion disc in NGC 2992 becomes more active at high accretion rates ( $L_{\rm bol}/L_{\rm Edd}\ge 4$ per cent). | en_US |
dc.language.iso | eng | en_US |
dc.title | The lively accretion disc in NGC 2992 - I. Transient iron K emission lines in the high-flux state | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/staa1683 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/496/3/3412/5857190?login=true | en_US |
dc.identifier.url | http://arxiv.org/abs/2006.05280v1 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 496 | en_US |
dc.relation.issue | 3 | en_US |
dc.relation.firstpage | 3412 | en_US |
dc.relation.lastpage | 3423 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | en_US |
dc.identifier.adsbibcode | 2020MNRAS.496.3412M | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Brera | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0002-2629-4989 | - |
crisitem.author.orcid | 0000-0001-9226-8992 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
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