Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/31001
DC Field | Value | Language |
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dc.contributor.author | Boogaard, Leindert A. | en_US |
dc.contributor.author | van der Werf, Paul | en_US |
dc.contributor.author | Weiss, Axel | en_US |
dc.contributor.author | Popping, Gergö | en_US |
dc.contributor.author | DECARLI, ROBERTO | en_US |
dc.contributor.author | Walter, Fabian | en_US |
dc.contributor.author | Aravena, Manuel | en_US |
dc.contributor.author | Bouwens, Rychard | en_US |
dc.contributor.author | Riechers, Dominik | en_US |
dc.contributor.author | González-López, Jorge | en_US |
dc.contributor.author | Smail, Ian | en_US |
dc.contributor.author | Carilli, Chris | en_US |
dc.contributor.author | Kaasinen, Melanie | en_US |
dc.contributor.author | Daddi, Emanuele | en_US |
dc.contributor.author | Cox, Pierre | en_US |
dc.contributor.author | Díaz-Santos, Tanio | en_US |
dc.contributor.author | Inami, Hanae | en_US |
dc.contributor.author | Cortes, Paulo C. | en_US |
dc.contributor.author | Wagg, Jeff | en_US |
dc.date.accessioned | 2021-09-01T10:05:05Z | - |
dc.date.available | 2021-09-01T10:05:05Z | - |
dc.date.issued | 2020 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/31001 | - |
dc.description.abstract | We investigate the CO excitation and interstellar medium (ISM) conditions in a cold gas mass-selected sample of 22 star-forming galaxies at z = 0.46-3.60, observed as part of the ALMA Spectroscopic Survey in the Hubble Ultra Deep Field (ASPECS). Combined with Very Large Array follow-up observations, we detect a total of 34 CO $J\to J-1$ transitions with J = 1 up to 8 (and an additional 21 upper limits, up to J = 10) and 6 $[{\rm{C}}\,{\rm\small{I}}]$ ${}^{3}{P}_{1}{\to }^{3}\,{P}_{0}$ and ${}^{3}{P}_{2}{\to }^{3}\,{P}_{1}$ transitions (and 12 upper limits). The CO(2-1) and CO(3-2)-selected galaxies, at $\langle z\rangle =1.2$ and 2.5, respectively, exhibit a range in excitation in their mid-J = 4, 5 and high-J = 7, 8 lines, on average lower than ( ${L}_{\mathrm{IR}}$ -brighter) BzK-color- and submillimeter-selected galaxies at similar redshifts. The former implies that a warm ISM component is not necessarily prevalent in gas mass-selected galaxies at $\langle z\rangle =1.2$ . We use stacking and Large Velocity Gradient models to measure and predict the average CO ladders at z < 2 and z ≥ 2, finding ${r}_{21}=0.75\pm 0.11$ and ${r}_{31}=0.77\pm 0.14$ , respectively. From the models, we infer that the galaxies at z ≥ 2 have intrinsically higher excitation than those at z < 2. This fits a picture in which the global excitation is driven by an increase in the star formation rate surface density of galaxies with redshift. We derive a neutral atomic carbon abundance of $(1.9\pm 0.4)\times {10}^{-5}$ , comparable to the Milky Way and main-sequence galaxies at similar redshifts, and fairly high densities (≥10<SUP>4</SUP> cm<SUP>-3</SUP>), consistent with the low-J CO excitation. Our results imply a decrease in the cosmic molecular gas mass density at z ≥ 2 compared to previous ASPECS measurements. | en_US |
dc.language.iso | eng | en_US |
dc.title | The ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: CO Excitation and Atomic Carbon in Star-forming Galaxies at z = 1-3 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/abb82f | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/abb82f | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 902 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 109 | 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 | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2020ApJ...902..109B | 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 | reserved | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0002-2662-8803 | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | Existing users please |
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Boogaard_2020_ApJ_902_109.pdf | Pdf editoriale | 5.39 MB | Adobe PDF |
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