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http://hdl.handle.net/20.500.12386/31701
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Riechers, Dominik A. | en_US |
dc.contributor.author | Weiss, Axel | en_US |
dc.contributor.author | Walter, Fabian | en_US |
dc.contributor.author | Carilli, Christopher L. | en_US |
dc.contributor.author | Cox, Pierre | en_US |
dc.contributor.author | DECARLI, ROBERTO | en_US |
dc.contributor.author | Neri, Roberto | en_US |
dc.date.accessioned | 2022-03-18T13:13:06Z | - |
dc.date.available | 2022-03-18T13:13:06Z | - |
dc.date.issued | 2022 | en_US |
dc.identifier.issn | 0028-0836 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/31701 | - |
dc.description.abstract | Distortions of the observed cosmic microwave background provide a direct measurement of the microwave background temperature at redshifts from 0 to 1 (refs. 1,2). Some additional background temperature estimates exist at redshifts from 1.8 to 3.3 based on molecular and atomic line-excitation temperatures in quasar absorption-line systems, but are model dependent3. No deviations from the expected (1 + z) scaling behaviour of the microwave background temperature have been seen4, but the measurements have not extended deeply into the matter-dominated era of the Universe at redshifts z > 3.3. Here we report observations of submillimetre line absorption from the water molecule against the cosmic microwave background at z = 6.34 in a massive starburst galaxy, corresponding to a lookback time of 12.8 billion years (ref. 5). Radiative pumping of the upper level of the ground-state ortho-H2O(110–101) line due to starburst activity in the dusty galaxy HFLS3 results in a cooling to below the redshifted microwave background temperature, after the transition is initially excited by the microwave background. This implies a microwave background temperature of 16.4–30.2 K (1σ range) at z = 6.34, which is consistent with a background temperature increase with redshift as expected from the standard ΛCDM cosmology4. | en_US |
dc.language.iso | eng | en_US |
dc.title | Microwave background temperature at a redshift of 6.34 from H2O absorption | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1038/s41586-021-04294-5 | en_US |
dc.identifier.scopus | 2-s2.0-85123974050 | en_US |
dc.identifier.url | https://www.nature.com/articles/s41586-021-04294-5 | en_US |
dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/85123974050 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 602 | en_US |
dc.relation.issue | 7895 | en_US |
dc.relation.firstpage | 58 | en_US |
dc.relation.lastpage | 62 | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | NATURE | en_US |
dc.type.miur | 262 Articolo in rivista | - |
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 | 0028-0836 | - |
crisitem.journal.ance | E116312 | - |
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File | Descrizione | Dimensioni | Formato | |
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2202.00693.pdf | preprint | 2.01 MB | Adobe PDF | Visualizza/apri |
Riechers_2022_Nature_short.pdf | [Administrators only] | 5.12 MB | Adobe PDF |
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