Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/28908
Campo DC | Valore | Lingua |
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dc.contributor.author | Heintz, K. E. | en_US |
dc.contributor.author | Ledoux, C. | en_US |
dc.contributor.author | Fynbo, J. P. U. | en_US |
dc.contributor.author | Jakobsson, P. | en_US |
dc.contributor.author | Noterdaeme, P. | en_US |
dc.contributor.author | Krogager, J. -K. | en_US |
dc.contributor.author | Bolmer, J. | en_US |
dc.contributor.author | Møller, P. | en_US |
dc.contributor.author | Vergani, S. D. | en_US |
dc.contributor.author | Watson, D. | en_US |
dc.contributor.author | Zafar, T. | en_US |
dc.contributor.author | De Cia, A. | en_US |
dc.contributor.author | Tanvir, N. R. | en_US |
dc.contributor.author | Malesani, D. B. | en_US |
dc.contributor.author | Japelj, J. | en_US |
dc.contributor.author | COVINO, Stefano | en_US |
dc.contributor.author | Kaper, L. | en_US |
dc.date.accessioned | 2020-12-17T10:01:52Z | - |
dc.date.available | 2020-12-17T10:01:52Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28908 | - |
dc.description.abstract | We present a survey for neutral atomic-carbon (C I) along gamma-ray burst (GRB) sightlines, which probes the shielded neutral gas-phase in the interstellar medium (ISM) of GRB host galaxies at high redshift. We compile a sample of 29 medium- to high-resolution GRB optical afterglow spectra spanning a redshift range through most of cosmic time from 1 < z < 6. We find that seven (≈25%) of the GRBs entering our statistical sample have C I detected in absorption. It is evident that there is a strong excess of cold gas in GRB hosts compared to absorbers in quasar sightlines. We investigate the dust properties of the GRB C I absorbers and find that the amount of neutral carbon is positively correlated with the visual extinction, A<SUB>V</SUB>, and the strength of the 2175 Å dust extinction feature, A<SUB>bump</SUB>. GRBs with C I detected in absorption are all observed above a certain threshold of logN(H I)/cm<SUP>-2</SUP> + [X/H] > 20.7 and a dust-phase iron column density of logN(Fe)<SUB>dust</SUB>/cm<SUP>-2</SUP> > 16.2. In contrast to the SED-derived dust properties, the strength of the C I absorption does not correlate with the depletion-derived dust properties. This indicates that the GRB C I absorbers trace dusty systems where the dust composition is dominated by carbon-rich dust grains. The observed higher metal and dust column densities of the GRB C I absorbers compared to H<SUB>2</SUB>- and C I-bearing quasar absorbers is mainly a consequence of how the two absorber populations are selected, but is also required in the presence of intense UV radiation fields in actively star-forming galaxies. | en_US |
dc.language.iso | eng | en_US |
dc.title | Cold gas in the early Universe. Survey for neutral atomic-carbon in GRB host galaxies at 1 < z< 6 from optical afterglow spectroscopy | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201834246 | en_US |
dc.identifier.scopus | 2-s2.0-85059480891 | en_US |
dc.identifier.isi | 000454400600004 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/full_html/2019/01/aa34246-18/aa34246-18.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 621 | en_US |
dc.relation.firstpage | A20 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2019A&A...621A..20H | 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 | 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. Brera | - |
crisitem.author.orcid | 0000-0001-9078-5507 | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
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