Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/25132
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | BERNARDI, GIANNI | en_US |
dc.contributor.author | Zwart, J. T. L. | en_US |
dc.contributor.author | Price, D. | en_US |
dc.contributor.author | Greenhill, L. J. | en_US |
dc.contributor.author | Mesinger, A. | en_US |
dc.contributor.author | Dowell, J. | en_US |
dc.contributor.author | Eftekhari, T. | en_US |
dc.contributor.author | Ellingson, S. W. | en_US |
dc.contributor.author | Kocz, J. | en_US |
dc.contributor.author | Schinzel, F. | en_US |
dc.date.accessioned | 2020-05-25T12:32:38Z | - |
dc.date.available | 2020-05-25T12:32:38Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/25132 | - |
dc.description.abstract | The birth of the first luminous sources and the ensuing epoch of reionization are best studied via the redshifted 21-cm emission line, the signature of the first two imprinting the last. In this work, we present a fully Bayesian method, HIBAYES, for extracting the faint, global (sky-averaged) 21-cm signal from the much brighter foreground emission. We show that a simplified (but plausible) Gaussian model of the 21-cm emission from the Cosmic Dawn epoch (15 ≲ z ≲ 30), parametrized by an amplitude A_{H I}, a frequency peak ν _{H I} and a width σ _{H I}, can be extracted even in the presence of a structured foreground frequency spectrum (parametrized as a seventh-order polynomial), provided sufficient signal-to-noise (400 h of observation with a single dipole). We apply our method to an early, 19-min-long observation from the Large aperture Experiment to detect the Dark Ages, constraining the 21-cm signal amplitude and width to be -890 < A_{H I} < 0 mK and σ _{H I} > 6.5 MHz (corresponding to ∆z > 1.9 at redshift z ≃ 20) respectively at the 95-per cent confidence level in the range 13.2 < z < 27.4 (100 > ν > 50 MHz). | en_US |
dc.language.iso | eng | en_US |
dc.title | Bayesian constraints on the global 21-cm signal from the Cosmic Dawn | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stw1499 | en_US |
dc.identifier.scopus | 2-s2.0-84983792816 | en_US |
dc.identifier.isi | 000383481100041 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/461/3/2847/2608619 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 461 | en_US |
dc.relation.issue | 3 | en_US |
dc.relation.firstpage | 2847 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | en_US |
dc.contributor.country | GBR | 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 | 2016MNRAS.461.2847B | 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 | IRA Bologna | - |
crisitem.author.orcid | 0000-0002-0916-7443 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
Bernardi2016.pdf | 1.33 MB | Adobe PDF | Visualizza/apri |
Page view(s)
56
controllato il 26-apr-2024
Download(s)
17
controllato il 26-apr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.