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http://hdl.handle.net/20.500.12386/27872
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Bischetti, M. | en_US |
dc.contributor.author | PICONCELLI, Enrico | en_US |
dc.contributor.author | Feruglio, Chiara | en_US |
dc.contributor.author | Duras, F. | en_US |
dc.contributor.author | BONGIORNO, ANGELA | en_US |
dc.contributor.author | Carniani, S. | en_US |
dc.contributor.author | Marconi, Alessandro | en_US |
dc.contributor.author | Pappalardo, C. | en_US |
dc.contributor.author | Schneider, R. | en_US |
dc.contributor.author | Travascio, A. | en_US |
dc.contributor.author | VALIANTE, ROSA | en_US |
dc.contributor.author | VIETRI, GIUSTINA | en_US |
dc.contributor.author | ZAPPACOSTA, Luca | en_US |
dc.contributor.author | Fiore, F. | en_US |
dc.date.accessioned | 2020-10-19T08:06:23Z | - |
dc.date.available | 2020-10-19T08:06:23Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27872 | - |
dc.description.abstract | We present an ALMA high-resolution (0.18″ × 0.21″) observation of the 840 μm continuum and [CII] λ157.74 μm line emission in the WISE-SDSS selected hyper-luminous (WISSH) quasi-stellar object (QSO) J1015+0020, at z ∼ 4.4. Our analysis reveals an exceptional overdensity of [CII]-emitting companions with a very small (<150 km s<SUP>-1</SUP>) velocity shift with respect to the QSO redshift. We report the discovery of the closest companion observed so far in submillimetre observations of high-z QSOs. It is only 2.2 kpc distant and merging with J1015+0020, while two other [CII] emitters are found at 8 and 17 kpc. Two strong continuum emitters are also detected at <3.5 arcsec from the QSO. They are likely associated with the same overdense structure of J1015+0020, as they exceed by a factor of 100 the number of expected sources, considering the log(N)-log(S) at 850 μm. The host galaxy of J1015+0020 shows a star formation rate (SFR) of about 100 M<SUB>☉</SUB> yr<SUP>-1</SUP>, while the total SFR of the QSO and its companion galaxies is a factor of ∼10 higher, indicating that substantial stellar mass assembly at early epochs may have taken place in the QSO satellites. For J1015+0020 we computed a black hole mass M<SUB>BH</SUB> ∼ 6 × 10<SUP>9</SUP> M<SUB>☉</SUB>. As we resolve the [CII] emission of the QSO, we can compute a dynamical mass of M<SUB>dyn</SUB> ∼ 4 × 10<SUP>10</SUP> M<SUB>☉</SUB>. This translates into an extreme ratio M<SUB>dyn</SUB>/M<SUB>BH</SUB> ∼ 7, i.e. two orders of magnitude smaller than what is typically observed in local galaxies. The total stellar mass of the QSO host galaxy plus the [CII] emitters in the ALMA field of view already exceeds 10<SUP>11</SUP> M<SUB>☉</SUB> at z ∼ 4.4. These sources will likely merge and develop into a giant galaxy of ∼1.3 × 10<SUP>12</SUP> M<SUB>☉</SUB>. Under the assumption of constant Ṁ<SUB>acc</SUB> or λ<SUB>Edd</SUB> equal to the observed values, we find that the growth timescale of the host galaxy of J1015+0020 is comparable or even shorter than that inferred for the SMBH. Based on data from ALMA cycle 4 program 2016.1.00718.S. | en_US |
dc.language.iso | eng | en_US |
dc.title | The WISSH quasars project. V. ALMA reveals the assembly of a giant galaxy around a z = 4.4 hyper-luminous QSO | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201833249 | en_US |
dc.identifier.scopus | 2-s2.0-85054068894 | en_US |
dc.identifier.isi | 000445285100002 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/abs/2018/09/aa33249-18/aa33249-18.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 617 | en_US |
dc.relation.firstpage | A82 | en_US |
dc.relation.numberofpages | 12 | en_US |
dc.type.referee | REF_1 | en_US |
dc.contributor.country | ITA | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2018A&A...617A..82B | 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 | O.A. Roma | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.dept | IASF Milano | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.orcid | 0000-0001-9095-2782 | - |
crisitem.author.orcid | 0000-0002-4227-6035 | - |
crisitem.author.orcid | 0000-0002-0101-6624 | - |
crisitem.author.orcid | 0000-0002-9889-4238 | - |
crisitem.author.orcid | 0000-0003-3050-1765 | - |
crisitem.author.orcid | 0000-0001-9155-8875 | - |
crisitem.author.orcid | 0000-0002-4205-6884 | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
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