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http://hdl.handle.net/20.500.12386/27019
Campo DC | Valore | Lingua |
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dc.contributor.author | Knudsen, Kirsten K. | en_US |
dc.contributor.author | Watson, Darach | en_US |
dc.contributor.author | Frayer, David | en_US |
dc.contributor.author | Christensen, Lise | en_US |
dc.contributor.author | GALLAZZI, Anna Rita | en_US |
dc.contributor.author | Michałowski, Michał J. | en_US |
dc.contributor.author | Richard, Johan | en_US |
dc.contributor.author | Zavala, Jesús | en_US |
dc.date.accessioned | 2020-09-01T08:21:28Z | - |
dc.date.available | 2020-09-01T08:21:28Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27019 | - |
dc.description.abstract | The gravitationally lensed galaxy A1689-zD1 is one of the most distant spectroscopically confirmed sources (z = 7.5). It is the earliest known galaxy where the interstellar medium (ISM) has been detected; dust emission was detected with the Atacama Large Millimetre Array (ALMA). A1689-zD1 is also unusual among high-redshift dust emitters as it is a sub-L<SUP>★</SUP> galaxy and is therefore a good prospect for the detection of gaseous ISM in a more typical galaxy at this redshift. We observed A1689-zD1 with ALMA in bands 6 and 7 and with the Green Bank Telescope (GBT) in band Q. To study the structure of A1689-zD1, we map the mm-thermal dust emission and find two spatial components with sizes about 0.4 - 1.7 kpc (lensing-corrected). The rough spatial morphology is similar to what is observed in the near-infrared with HST and points to a perturbed dynamical state, perhaps indicative of a major merger or a disc in early formation. The ALMA photometry is used to constrain the far-infrared spectral energy distribution, yielding a dust temperature (T<SUB>dust</SUB> ∼ 35-45 K for β = 1.5 - 2). We do not detect the CO(3-2) line in the GBT data with a 95 per cent upper limit of 0.3 mJy observed. We find a slight excess emission in ALMA band 6 at 220.9 GHz. If this excess is real, it is likely due to emission from the [C II] 158.8 μm line at z_[C II] = 7.603. The stringent upper limits on the [C II] L<SUB>FIR</SUB> luminosity ratio suggest a [C II] deficit similar to several bright quasars and massive starbursts. | en_US |
dc.language.iso | eng | en_US |
dc.title | A merger in the dusty, z = 7.5 galaxy A1689-zD1? | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stw3066 | en_US |
dc.identifier.scopus | 2-s2.0-85013208445 | en_US |
dc.identifier.isi | 000398112400010 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/466/1/138/2608767 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 466 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 138 | 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 | - |
dc.identifier.adsbibcode | 2017MNRAS.466..138K | 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 | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0002-9656-1800 | - |
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