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dc.contributor.authorD'Odorico, Ven
dc.contributor.authorCristiani, Sen
dc.contributor.authorPomante, Een
dc.contributor.authorCarswell, RFen
dc.contributor.authorViel, Men
dc.contributor.authorBarai, Pen
dc.contributor.authorBecker, GDen
dc.contributor.authorCalura, Fen
dc.contributor.authorCupani, Gen
dc.contributor.authorFontanot, Fen
dc.contributor.authorHaehnelt, Martinen
dc.contributor.authorKim, T-Sen
dc.contributor.authorMiralda-Escude, Jen
dc.contributor.authorRorai, Albertoen
dc.contributor.authorTescari, Een
dc.contributor.authorVanzella, Een
dc.date.accessioned2016-10-19T10:50:18Z
dc.date.available2016-10-19T10:50:18Z
dc.date.issued2016-09-28en
dc.identifier.issn0035-8711
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/260816
dc.description.abstractIn this work, we investigate the abundance and distribution of metals in the intergalactic medium (IGM) at 〈z〉 ≃ 2.8 through the analysis of an ultra-high signal-to-noise ratio UVES spectrum of the quasar HE0940-1050. In the C iv forest, our deep spectrum is sensitive at 3σ to lines with column density down to log N$_{CIV}$$\simeq$ 11.4 and in 60 per cent of the considered redshift range down to $\simeq$ 11.1. In our sample, all H I lines with log N$_{HI}$ ≥ 14.8 show an associated C IV absorption. In the range 14.0 ≤ log N$_{HI}$ < 14.8, 43 per cent of H I lines has an associated C IV absorption. At log N$_{HI}$ < 14.0, the detection rates drop to <10 per cent, possibly due to our sensitivity limits and not to an actual variation of the gas abundance properties. In the range log$_{HI}$N ≥ 14, we observe a fraction of H I lines with detected C IV a factor of 2 larger than the fraction of H I lines lying in the circumgalactic medium (CGM) of relatively bright Lyman-break galaxies hosted by dark matter haloes with 〈M〉$\sim$ 10$^{12}$ M$\odot$. The comparison of our results with the output of a grid of photoionization models and of two cosmological simulations implies that the volume filling factor of the IGM gas enriched to a metallicity logZ/Z$\odot$$\gtrsim$ −3 should be of the order of $\sim$10–13 per cent. In conclusion, our results favour a scenario in which metals are found also outside the CGM of bright star-forming galaxies, possibly due to pollution by lower mass objects and/or to an early enrichment by the first sources.
dc.description.sponsorshipMV is supported by the ERC Starting Grant ‘cosmoIGM’ and PD51 INDARK grant. TSK acknowledges funding support from the ERC Starting Grant ‘cosmoIGM’, through grant GA-257670. MH was supported by the ERC Advanced Grant 320596 ‘The Emergence of Structure during the epoch of Reionisation’. PB is supported by the INAF PRIN-2014 grant ‘Windy black holes combing galaxy evolution’. Parts of this research were conducted by the Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO), through project number CE110001020.
dc.languageEnglishen
dc.language.isoenen
dc.publisherOxford University Press
dc.subjectintergalactic mediumen
dc.subjectquasars: absorption linesen
dc.subjectcosmology: observationsen
dc.subjectgalaxies:abundancesen
dc.titleMetals in the z~3 intergalactic medium: results from an ultra-high signal-to-noise ratio UVES quasar spectrumen
dc.typeArticle
dc.description.versionThis is the final version of the article. It first appeared from Oxford University Press via http://dx.doi.org/10.1093/mnras/stw2161en
prism.endingPage2707
prism.publicationDate2016en
prism.publicationNameMonthly Notices of the Royal Astronomical Societyen
prism.startingPage2690
prism.volume463en
dc.identifier.doi10.17863/CAM.5975
dcterms.dateAccepted2016-08-24en
rioxxterms.versionofrecord10.1093/mnras/stw2161en
rioxxterms.versionVoRen
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2016-09-28en
dc.contributor.orcidHaehnelt, Martin [0000-0001-8443-2393]
dc.identifier.eissn1365-2966
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEuropean Research Council (320596)
cam.orpheus.successThu Jan 30 12:57:14 GMT 2020 - The item has an open VoR version.*
rioxxterms.freetoread.startdate2100-01-01


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