Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/29184
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Berg, T. A. M. | en_US |
dc.contributor.author | Ellison, S. L. | en_US |
dc.contributor.author | Prochaska, J. X. | en_US |
dc.contributor.author | Sánchez-Ramírez, R. | 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 | 2020-12-23T17:00:11Z | - |
dc.date.available | 2020-12-23T17:00:11Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29184 | - |
dc.description.abstract | The XQ-100 survey provides optical and near-infrared coverage of 36 blindly selected, intervening damped Lyman α systems (DLAs) at 2 < z<SUB>abs</SUB> < 4, simultaneously covering the Mg II doublet at λλ2796, 2803Å, and the Ly α transition. Using the XQ-100 DLA sample, we investigate the completeness of selecting DLA absorbers based on their Mg II rest-frame equivalent width (W<SUB>0</SUB>^{2796}) at these redshifts. Of the 29 DLAs with clean Mg II profiles, we find that six (20 per cent of DLAs) have W<SUB>0</SUB>^{2796} < 0.6 Å. The DLA incidence rate of W<SUB>0</SUB>^{2796} < 0.6 Å absorbers is a factor of ∼5 higher than what is seen in z ∼ 1 samples, indicating a potential evolution in the Mg II properties of DLAs with redshift. All of the W<SUB>0</SUB>^{2796} < 0.6 Å DLAs have low metallicities (-2.5 < [M/H] < -1.7), small velocity widths (v<SUB>90</SUB> < 50 km s<SUP>-1</SUP>), and tend to have relatively low N(H I). We demonstrate that the exclusion of these low W<SUB>0</SUB>^{2796} DLAs results in a higher mean N(H I) which in turn leads to an ∼7 per cent increase in the cosmological gas density of H I of DLAs at 2 < z<SUB>abs</SUB> < 4; and that this exclusion has a minimal effect on the H I-weighted mean metallicity. | en_US |
dc.language.iso | eng | en_US |
dc.title | On the selection of damped Lyman α systems using Mg II absorption at 2 < z<SUB>abs</SUB> < 4 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnrasl/slw185 | en_US |
dc.identifier.scopus | 2-s2.0-85022201432 | en_US |
dc.identifier.isi | 000403097500012 | en_US |
dc.identifier.url | https://academic.oup.com/mnrasl/article/464/1/L56/2891003 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 464 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | L56 | 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 | DEU | en_US |
dc.contributor.country | ESP | en_US |
dc.contributor.country | CAN | 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 | 2017MNRAS.464L..56B | 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.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. 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 |
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File | Description | Size | Format | |
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slw185.pdf | pdf editoriale | 415.93 kB | Adobe PDF | View/Open |
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