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http://hdl.handle.net/20.500.12386/29548
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | BIANCHI, STEFANO | en_US |
dc.contributor.author | Antonucci, Robert | en_US |
dc.contributor.author | CAPETTI, Alessandro | en_US |
dc.contributor.author | Chiaberge, Marco | en_US |
dc.contributor.author | Laor, Ari | en_US |
dc.contributor.author | BASSANI, LOREDANA | en_US |
dc.contributor.author | Carrera, Francisco J. | en_US |
dc.contributor.author | LA FRANCA, FABIO | en_US |
dc.contributor.author | Marinucci, Andrea | en_US |
dc.contributor.author | Matt, Giorgio | en_US |
dc.contributor.author | MIDDEI, RICCARDO | en_US |
dc.contributor.author | PANESSA, Francesca | en_US |
dc.date.accessioned | 2021-01-07T13:28:42Z | - |
dc.date.available | 2021-01-07T13:28:42Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29548 | - |
dc.description.abstract | NGC 3147 has been considered the best case of a true type 2 AGN: an unobscured AGN, based on the unabsorbed compact X-ray continuum, which lacks a broad-line region (BLR). However, the very low luminosity of NGC 3147 implies a compact BLR, which produces very broad lines, hard to detect against the dominant background host galaxy. Narrow (0.1 arcsec × 0.1 arcsec) slit HST spectroscopy allowed us to exclude most of the host galaxy light, and revealed an H α line with an extremely broad base (FWZI{∼ }27 000 km s<SUP>-1</SUP>). The line profile shows a steep cut-off blue wing and an extended red wing, which match the signature of a mildly relativistic thin accretion disc line profile. It is indeed well fit with a nearly face on thin disc, at i ∼ 23<SUP>°</SUP>, with an inner radius at 77 ± 15 r<SUB>g</SUB>, which matches the prediction of 62^{+18}_{-14}r<SUB>g</SUB> from the R<SUB>BLR</SUB>-L<SUP>1/2</SUP> relation. This result questions the very existence of true type 2 AGN. Moreover, the detection of a thin disc, which extends below 100 r<SUB>g</SUB> in an L/L<SUB>Edd</SUB> ∼ 10<SUP>-4</SUP> system, contradicts the current view of the accretion flow configuration at extremely low accretion rates. | en_US |
dc.language.iso | eng | en_US |
dc.title | HST unveils a compact mildly relativistic broad-line region in the candidate true type 2 NGC 3147 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnrasl/slz080 | en_US |
dc.identifier.scopus | 2-s2.0-85073048981 | en_US |
dc.identifier.isi | 000482696200001 | en_US |
dc.identifier.url | https://academic.oup.com/mnrasl/article/488/1/L1/5522653 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 488 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | L1 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | en_US |
dc.contributor.country | ESP | en_US |
dc.contributor.country | ISR | 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 | - |
dc.identifier.adsbibcode | 2019MNRAS.488L...1B | 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.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | O.A. Torino | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.orcid | 0000-0003-3684-4275 | - |
crisitem.author.orcid | 0000-0003-4858-6963 | - |
crisitem.author.orcid | 0000-0003-0543-3617 | - |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
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Bianchi_1905.09627.pdf | preprint | 571.66 kB | Adobe PDF | Visualizza/apri |
HST unveils a compact mildly relativistic broad-line region in the candidate true type 2 NGC 3147 - slz080.pdf.pdf | pdf editoriale | 707.82 kB | Adobe PDF | Visualizza/apri |
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