The NIRVANDELS Survey: a robust detection of α-enhancement in star-forming galaxies at z 3.4

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dc.contributor.authorCullen, F.
dc.contributor.authorShapley, A.
dc.contributor.authorMcLure, R.
dc.contributor.authorDunlop, J.S
dc.contributor.authorSanders, R.L
dc.contributor.authorTopping, M.W
dc.contributor.authorReddy, N.A
dc.contributor.authorAmorin, R.
dc.contributor.authorBegley, R.
dc.contributor.authorBolzonella, M.
dc.contributor.authorCalabro, A.
dc.contributor.authorCarnall, A.C
dc.contributor.authorCastellano, M.
dc.contributor.authorCimatti, A.
dc.contributor.authorCirasuolo, M.
dc.contributor.authorCresci, G.
dc.contributor.authorFontana, A.
dc.contributor.authorFontanot, F.
dc.contributor.authorGarilli, B.
dc.contributor.authorGuaita, L.
dc.contributor.authorHamadouche, M.
dc.contributor.authorHathi, N.P
dc.contributor.authorMannucci, F.
dc.contributor.authorMcLeod, D. J
dc.contributor.authorPentericci, L.
dc.contributor.authorSaxena, A.
dc.contributor.authorTalia, M.
dc.contributor.authorZamorani, G.
dc.date.accessioned2021-07-09T16:41:46Z
dc.date.available2021-07-09T16:41:46Z
dc.date.issued2021-05
dc.descriptionIndexación: Scopuses
dc.description.abstractWe present results from the NIRVANDELS survey on the gas-phase metallicity (Zg, tracing O/H) and stellar metallicity (Z∗, tracing Fe/H) of 33 star-forming galaxies at redshifts 2.95 < z < 3.80. Based on a combined analysis of deep optical and near-IR spectra, tracing the rest-frame far-ultraviolet (FUV; 1200-2000 Å) and rest-frame optical (3400-5500 Å), respectively, we present the first simultaneous determination of the stellar and gas-phase mass-metallicity relationships (MZRs) at z ≃ 3.4. In both cases, we find that metallicity increases with increasing stellar mass (M∗) and that the power-law slope at M∗ ≤ 1010M⊙ of both MZRs scales as Z ∝ M∗0.3. Comparing the stellar and gas-phase MZRs, we present direct evidence for super-solar O/Fe ratios (i.e. α-enhancement) at z > 3, finding (O/Fe) = 2.54 ± 0.38 × (O/Fe)⊙, with no clear dependence on M∗. © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.es
dc.identifier.citationMonthly Notices of the Royal Astronomical Society Open Access Volume 505, Issue 1, Pages 903 - 9201 July 2021es
dc.identifier.issn00358711
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/19336
dc.language.isoenes
dc.publisherOxford University Presses
dc.titleThe NIRVANDELS Survey: a robust detection of α-enhancement in star-forming galaxies at z 3.4es
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