Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/24980
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Berg, T. A. M. | en_US |
dc.contributor.author | Ellison, S. L. | en_US |
dc.contributor.author | Sánchez-Ramírez, R. | en_US |
dc.contributor.author | Prochaska, J. X. | en_US |
dc.contributor.author | Lopez, S. | en_US |
dc.contributor.author | D'ODORICO, Valentina | en_US |
dc.contributor.author | Becker, G. | en_US |
dc.contributor.author | Christensen, L. | en_US |
dc.contributor.author | CUPANI, Guido | en_US |
dc.contributor.author | Denney, K. | en_US |
dc.contributor.author | Worseck, G. | en_US |
dc.date.accessioned | 2020-05-19T18:24:30Z | - |
dc.date.available | 2020-05-19T18:24:30Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/24980 | - |
dc.description.abstract | The XQ-100 survey has provided high signal-noise spectra of 100 redshift 3-4.5 quasars with the X-Shooter spectrograph. The metal abundances for 13 elements in the 41 damped Ly α systems (DLAs) identified in the XQ-100 sample are presented, and an investigation into abundances of a variety of DLA classes is conducted. The XQ-100 DLA sample contains five DLAs within 5000 km s<SUP>-1</SUP> of their host quasar (proximate DLAs; PDLAs) as well as three sightlines which contain two DLAs within 10 000 km s<SUP>-1</SUP> of each other along the same line of sight (multiple DLAs; MDLAs). Combined with previous observations in the literature, we demonstrate that PDLAs with log N(H I) < 21.0 show lower [S/H] and [Fe/H] [relative to intervening systems with similar redshift and N(H I)], whilst higher [S/H] and [Si/H] are seen in PDLAs with log N(H I) > 21.0. These abundance discrepancies are independent of their line-of-sight velocity separation from the host quasar, and the velocity width of the metal lines (v<SUB>90</SUB>). Contrary to previous studies, MDLAs show no difference in [α/Fe] relative to single DLAs matched in metallicity and redshift. In addition, we present follow-up UVES data of J0034+1639, a sightline containing three DLAs, including a metal-poor DLA with [Fe/H] = -2.82 (the third lowest [Fe/H] in DLAs identified to date) at z<SUB>abs</SUB> = 4.25. Lastly we study the dust-corrected [Zn/Fe], emphasizing that near-IR coverage of X-Shooter provides unprecedented access to Mg II, Ca II and Ti II lines (at redshifts 3-4) to provide additional evidence for subsolar [Zn/Fe] ratio in DLAs. | en_US |
dc.language.iso | eng | en_US |
dc.title | Chemical abundances of the damped Lyman α systems in the XQ-100 survey | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stw2232 | en_US |
dc.identifier.scopus | 2-s2.0-85014995749 | en_US |
dc.identifier.isi | 000393566000057 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/463/3/3021/2646633 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 463 | en_US |
dc.relation.issue | 3 | en_US |
dc.relation.firstpage | 3021 | en_US |
dc.relation.lastpage | 3037 | en_US |
dc.relation.numberofpages | 17 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 11 | 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.contributor.country | DEU | en_US |
dc.contributor.country | ESP | en_US |
dc.contributor.country | CAN | en_US |
dc.contributor.country | CHL | en_US |
dc.contributor.country | DNK | 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.463.3021B | 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::PE9_8 Formation and evolution of galaxies | 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 | O.A. Trieste | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.orcid | 0000-0003-3693-3091 | - |
crisitem.author.orcid | 0000-0002-6830-9093 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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DLA_XQ100.pdf | PDF editoriale | 2.11 MB | Adobe PDF | View/Open |
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