Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/31266
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Yang, Jinyi | en_US |
dc.contributor.author | Wang, Feige | en_US |
dc.contributor.author | Fan, Xiaohui | en_US |
dc.contributor.author | Hennawi, Joseph F. | en_US |
dc.contributor.author | Davies, Frederick B. | en_US |
dc.contributor.author | Yue, Minghao | en_US |
dc.contributor.author | Banados, Eduardo | en_US |
dc.contributor.author | Wu, Xue-Bing | en_US |
dc.contributor.author | Venemans, Bram | en_US |
dc.contributor.author | Barth, Aaron J. | en_US |
dc.contributor.author | Bian, Fuyan | en_US |
dc.contributor.author | Boutsia, Konstantina | en_US |
dc.contributor.author | DECARLI, ROBERTO | en_US |
dc.contributor.author | Farina, Emanuele Paolo | en_US |
dc.contributor.author | Green, Richard | en_US |
dc.contributor.author | Jiang, Linhua | en_US |
dc.contributor.author | Li, Jiang-Tao | en_US |
dc.contributor.author | Mazzucchelli, Chiara | en_US |
dc.contributor.author | Walter, Fabian | en_US |
dc.date.accessioned | 2021-12-28T10:39:47Z | - |
dc.date.available | 2021-12-28T10:39:47Z | - |
dc.date.issued | 2020 | en_US |
dc.identifier.issn | 2041-8205 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/31266 | - |
dc.description.abstract | We report the discovery of a luminous quasar, J1007+2115 at z = 7.515 ("Pōniuā'ena"), from our wide-field reionization-era quasar survey. J1007+2115 is the second quasar now known at z > 7.5, deep into the reionization epoch. The quasar is powered by a (1.5 ± 0.2) × 10<SUP>9</SUP> M<SUB>⊙</SUB> supermassive black hole (SMBH), based on its broad Mg II emission-line profile from Gemini and Keck near-IR spectroscopy. The SMBH in J1007+2115 is twice as massive as that in quasar J1342+0928 at z = 7.54, the current quasar redshift record holder. The existence of such a massive SMBH just 700 million years after the Big Bang significantly challenges models of the earliest SMBH growth. Model assumptions of Eddington-limited accretion and a radiative efficiency of 0.1 require a seed black hole of ≳10<SUP>4</SUP> M<SUB>⊙</SUB> at z = 30. This requirement suggests either a massive black hole seed as a result of direct collapse or earlier periods of rapid black hole growth with hyper-Eddington accretion and/or a low radiative efficiency. We measure the damping wing signature imprinted by neutral hydrogen absorption in the intergalactic medium (IGM) on J1007+2115's Lyα line profile, and find that it is weaker than that of J1342+0928 and two other z ≳ 7 quasars. We estimate an IGM volume-averaged neutral fraction $\langle {X}_{{\rm{H}}{\rm{I}}}\rangle ={0.39}_{-0.13}^{+0.22}$ . This range of values suggests a patchy reionization history toward different IGM sightlines. We detect the 158 μm [C II] emission line in J1007+2115 with the Atacama Large Millimeter/submillimeter Array; this line centroid yields a systemic redshift of z = 7.5149 ± 0.0004 and indicates a star formation rate of ∼210 M<SUB>⊙</SUB> yr<SUP>-1</SUP> in its host galaxy. | en_US |
dc.language.iso | eng | en_US |
dc.title | Pōniuā'ena: A Luminous z = 7.5 Quasar Hosting a 1.5 Billion Solar Mass Black Hole | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/2041-8213/ab9c26 | en_US |
dc.identifier.scopus | 2-s2.0-85091393708 | en_US |
dc.identifier.isi | WOS:000548369300001 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/2041-8213/ab9c26 | en_US |
dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/85091393708 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 897 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | L14 | 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 | THE ASTROPHYSICAL JOURNAL LETTERS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2020ApJ...897L..14Y | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation | 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 | OAS Bologna | - |
crisitem.author.orcid | 0000-0002-2662-8803 | - |
crisitem.journal.journalissn | 2041-8205 | - |
crisitem.journal.ance | E196528 | - |
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2006.13452.pdf | preprint | 1.14 MB | Adobe PDF | Visualizza/apri |
Yang_2020_ApJL_897_L14.pdf | [Administrators only] | 1.54 MB | Adobe PDF |
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