Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/30746
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | NICASTRO, FABRIZIO | en_US |
dc.contributor.author | Kaastra, J. | en_US |
dc.contributor.author | Krongold, Y. | en_US |
dc.contributor.author | BORGANI, STEFANO | en_US |
dc.contributor.author | Branchini, Enzo Franco | en_US |
dc.contributor.author | Cen, R. | en_US |
dc.contributor.author | DADINA, MAURO | en_US |
dc.contributor.author | Danforth, C. W. | en_US |
dc.contributor.author | Elvis, M. | en_US |
dc.contributor.author | FIORE, Fabrizio | en_US |
dc.contributor.author | Gupta, A. | en_US |
dc.contributor.author | Mathur, S. | en_US |
dc.contributor.author | Mayya, D. | en_US |
dc.contributor.author | Paerels, F. | en_US |
dc.contributor.author | PIRO, LUIGI | en_US |
dc.contributor.author | Rosa-Gonzalez, D. | en_US |
dc.contributor.author | Schaye, J. | en_US |
dc.contributor.author | Shull, J. M. | en_US |
dc.contributor.author | Torres-Zafra, J. | en_US |
dc.contributor.author | Wijers, N. | en_US |
dc.contributor.author | ZAPPACOSTA, Luca | en_US |
dc.date.accessioned | 2021-04-13T11:18:41Z | - |
dc.date.available | 2021-04-13T11:18:41Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0028-0836 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/30746 | - |
dc.description.abstract | It has been known for decades that the observed number of baryons in the local Universe falls about 30-40 per cent short<SUP>1,2</SUP> of the total number of baryons predicted<SUP>3</SUP> by Big Bang nucleosynthesis, as inferred<SUP>4,5</SUP> from density fluctuations of the cosmic microwave background and seen during the first 2-3 billion years of the Universe in the so-called `Lyman α forest'<SUP>6,7</SUP> (a dense series of intervening H i Lyman α absorption lines in the optical spectra of background quasars). A theoretical solution to this paradox locates the missing baryons in the hot and tenuous filamentary gas between galaxies, known as the warm-hot intergalactic medium. However, it is difficult to detect them there because the largest by far constituent of this gas—hydrogen—is mostly ionized and therefore almost invisible in far-ultraviolet spectra with typical signal-to-noise ratios<SUP>8,9</SUP>. Indeed, despite large observational efforts, only a few marginal claims of detection have been made so far<SUP>2,10</SUP>. Here we report observations of two absorbers of highly ionized oxygen (O vii) in the high-signal-to-noise-ratio X-ray spectrum of a quasar at a redshift higher than 0.4. These absorbers show no variability over a two-year timescale and have no associated cold absorption, making the assumption that they originate from the quasar's intrinsic outflow or the host galaxy's interstellar medium implausible. The O vii systems lie in regions characterized by large (four times larger than average<SUP>11</SUP>) galaxy overdensities and their number (down to the sensitivity threshold of our data) agrees well with numerical simulation predictions for the long-sought warm-hot intergalactic medium. We conclude that the missing baryons have been found. | en_US |
dc.language.iso | eng | en_US |
dc.title | Observations of the missing baryons in the warm-hot intergalactic medium | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1038/s41586-018-0204-1 | en_US |
dc.identifier.scopus | 2-s2.0-85048949105 | en_US |
dc.identifier.isi | 000436037800042 | en_US |
dc.identifier.url | https://www.nature.com/articles/s41586-018-0204-1 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 558 | en_US |
dc.relation.issue | 7710 | en_US |
dc.relation.firstpage | 406 | en_US |
dc.relation.lastpage | 409 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 21 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | 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.identifier.adsbibcode | 2018Natur.558..406N | 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 | OAS Bologna | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.orcid | 0000-0002-6896-1364 | - |
crisitem.author.orcid | 0000-0001-6151-6439 | - |
crisitem.author.orcid | 0000-0002-7858-7564 | - |
crisitem.author.orcid | 0000-0002-4031-4157 | - |
crisitem.author.orcid | 0000-0003-4159-3984 | - |
crisitem.author.orcid | 0000-0002-4205-6884 | - |
crisitem.journal.journalissn | 0028-0836 | - |
crisitem.journal.ance | E116312 | - |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
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File | Descrizione | Dimensioni | Formato | |
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1806.08395.pdf | preprint | 8.63 MB | Adobe PDF | Visualizza/apri |
s41586-018-0204-1.pdf | [Administrators only] | 3.34 MB | Adobe PDF |
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