Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/28645
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bañados, Eduardo | en_US |
dc.contributor.author | Rauch, Michael | en_US |
dc.contributor.author | DECARLI, ROBERTO | en_US |
dc.contributor.author | Farina, Emanuele P. | en_US |
dc.contributor.author | Hennawi, Joseph F. | en_US |
dc.contributor.author | Mazzucchelli, Chiara | en_US |
dc.contributor.author | Venemans, Bram P. | en_US |
dc.contributor.author | Walter, Fabian | en_US |
dc.contributor.author | Simcoe, Robert A. | en_US |
dc.contributor.author | Prochaska, J. Xavier | en_US |
dc.contributor.author | Cooper, Thomas | en_US |
dc.contributor.author | Davies, Frederick B. | en_US |
dc.contributor.author | Chen, Shi-Fan S. | en_US |
dc.date.accessioned | 2020-12-03T12:11:57Z | - |
dc.date.available | 2020-12-03T12:11:57Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28645 | - |
dc.description.abstract | We identify a strong Lyα damping wing profile in the spectrum of the quasar P183+05 at z = 6.4386. Given the detection of several narrow metal absorption lines at z = 6.40392, the most likely explanation for the absorption profile is that it is due to a damped Lyα system. However, in order to match the data a contribution of an intergalactic medium 5%-38% neutral or additional weaker absorbers near the quasar is also required. The absorption system presented here is the most distant damped Lyα system currently known. We estimate an H I column density of 10<SUP>20.68±0.25</SUP> cm<SUP>-2</SUP>, metallicity [O/H] = -2.92 ± 0.32, and relative chemical abundances of a system consistent with a low-mass galaxy during the first Gyr of the universe. This object is among the most metal-poor damped Lyα systems known and, even though it is observed only ∼850 Myr after the big bang, its relative abundances do not show signatures of chemical enrichment by Population III stars. | en_US |
dc.language.iso | eng | en_US |
dc.title | A Metal-poor Damped Lyα System at Redshift 6.4 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/ab4129 | en_US |
dc.identifier.scopus | 2-s2.0-85075237385 | en_US |
dc.identifier.isi | 000498641700004 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/ab4129 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 885 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 59 | en_US |
dc.type.referee | REF_1 | 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 | 2019ApJ...885...59B | 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.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
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 | |
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Bañados_2019_ApJ_885_59.pdf | Pdf editoriale | 6.16 MB | Adobe PDF | View/Open |
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