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http://hdl.handle.net/20.500.12386/30226
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Venemans, Bram | en_US |
dc.contributor.author | Walter, Fabian | en_US |
dc.contributor.author | DECARLI, ROBERTO | en_US |
dc.contributor.author | ferkinhoff, c. | en_US |
dc.contributor.author | weiss, a. | en_US |
dc.contributor.author | Findlay, J.R. | en_US |
dc.contributor.author | McMahon, R.G. | en_US |
dc.contributor.author | Sutherland, W.J. | en_US |
dc.contributor.author | Meijerink, R. | en_US |
dc.date.accessioned | 2021-02-08T11:21:14Z | - |
dc.date.available | 2021-02-08T11:21:14Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/30226 | - |
dc.description.abstract | We present ALMA band 3 observations of the CO(6-5), CO(7-6), and [C I] 369 μm emission lines in three of the highest-redshift quasar host galaxies at 6.6< z< 6.9. These measurements constitute the highest-redshift CO detections to date. The target quasars have previously been detected in [C II] 158 μm emission and the underlying FIR dust continuum. We detect (spatially unresolved, at a resolution of >2″, or ≳14 kpc) CO emission in all three quasar hosts. In two sources, we detect the continuum emission around 400 μm (rest-frame), and in one source we detect [C I] at low significance. We derive molecular gas reservoirs of (1-3) × 1010 {M}☉ in the quasar hosts, i.e., approximately only 10 times the mass of their central supermassive black holes. The extrapolated [C II]-to-CO(1-0) luminosity ratio is 2500-4200, consistent with measurements in galaxies at lower redshift. The detection of the [C I] line in one quasar host galaxy and the limit on the [C I] emission in the other two hosts enables a first characterization of the physical properties of the interstellar medium in z ∼ 7 quasar hosts. In the sources, the derived global CO/[C II]/[C I] line ratios are consistent with expectations from photodissociation regions, but not X-ray-dominated regions. This suggest that quantities derived from the molecular gas and dust emission are related to ongoing star-formation activity in the quasar hosts, providing further evidence that the quasar hosts studied here harbor intense starbursts in addition to their active nucleus. | en_US |
dc.language.iso | eng | en_US |
dc.title | Molecular Gas in Three z ∼ 7 Quasar Host Galaxies | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/aa81cb | en_US |
dc.identifier.scopus | 2-s2.0-85028733747 | en_US |
dc.identifier.isi | 000408223500005 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/aa81cb | en_US |
dc.relation.medium | STAMPA | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2017ApJ...845..154V | 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.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0002-2662-8803 | - |
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