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| Verfasst von: | Sebastian, Alma Maria [VerfasserIn]  |
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| | Ryan-Weber, Emma [VerfasserIn] |
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| | Davies, Rebecca L [VerfasserIn] |
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| | Becker, George D [VerfasserIn] |
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| | Keating, Laura C [VerfasserIn] |
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| | D’Odorico, Valentina [VerfasserIn] |
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| | Meyer, Romain A [VerfasserIn] |
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| | Bosman, Sarah [VerfasserIn] |
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| | Cupani, Guido [VerfasserIn] |
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| | Kulkarni, Girish [VerfasserIn] |
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| | Haehnelt, Martin G [VerfasserIn] |
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| | Lai, Samuel [VerfasserIn] |
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| | Eilers, Anna-Christina [VerfasserIn] |
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| | Bischetti, Manuela [VerfasserIn] |
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| | Gallerani, Simona [VerfasserIn] |
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| Titel: | E-XQR-30 |
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| Titelzusatz: | the evolution of Mg ii, C ii, and O i across 2 < z < 6 |
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| Verf.angabe: | Alma Maria Sebastian, Emma Ryan-Weber, Rebecca L Davies, George D Becker, Laura C Keating, Valentina D’Odorico, Romain A Meyer, Sarah E I Bosman, Guido Cupani, Girish Kulkarni, Martin G Haehnelt, Samuel Lai, Anna-Christina Eilers, Manuela Bischetti and Simona Gallerani |
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| E-Jahr: | 2024 |
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| Jahr: | May 2024 |
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| Umfang: | 20 S. |
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| Illustrationen: | Diagramme |
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| Fussnoten: | Online veröffentlicht: 19. März 2024 ; Gesehen am 10.10.2024 |
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| Titel Quelle: | Enthalten in: Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society |
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| Ort Quelle: | Oxford : Oxford Univ. Press, 1827 |
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| Jahr Quelle: | 2024 |
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| Band/Heft Quelle: | 530(2024), 2 vom: Mai, Seite 1829-1848 |
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| ISSN Quelle: | 1365-2966 |
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| Abstract: | Intervening metal absorbers in quasar spectra at z > 6 can be used as probes to study the chemical enrichment of the Universe during the Epoch of Reionization. This work presents the comoving line densities (dn/dX) of low-ionization absorbers, namely, Mg ii (2796 Å), C ii (1334 Å), and O i (1302 Å) across 2 < z < 6 using the E-XQR-30 metal absorber catalogue prepared from 42 XSHOOTER quasar spectra at 5.8 < z < 6.6. Here, we analyse 280 Mg ii (1.9 < z < 6.4), 22 C ii (5.2 < z < 6.4), and 10 O i (5.3 < z < 6.4) intervening absorbers, thereby building up on previous studies with improved sensitivity of 50 per cent completeness at an equivalent width of W > 0.03 Å. For the first time, we present the comoving line densities of 131 weak (W < 0.3 Å) intervening Mg ii absorbers at 1.9 < z < 6.4 which exhibit constant evolution with redshift similar to medium (0.3 < W < 1.0 Å) absorbers. However, the cosmic mass density of Mg ii - dominated by strong Mg ii systems - traces the evolution of global star formation history from redshift 1.9 to 5.5. E-XQR-30 also increases the absorption path-length by a factor of 50 per cent for C ii and O i whose line densities show a rising trend towards z > 5, in agreement with previous works. In the context of a decline in the metal enrichment of the Universe at z > 5, the overall evolution in the incidence rates of absorption systems can be explained by a weak - possibly soft fluctuating - ultraviolet background. Our results, thereby, provide evidence for a late reionization continuing to occur in metal-enriched and therefore, biased regions in the Universe. |
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| DOI: | doi:10.1093/mnras/stae789 |
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| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
kostenfrei: Volltext: https://doi.org/10.1093/mnras/stae789 |
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| | DOI: https://doi.org/10.1093/mnras/stae789 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| K10plus-PPN: | 1905340338 |
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| Verknüpfungen: | → Zeitschrift |
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