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

F. Cullen; A. E. Shapley; R. J. McLure; J. S. Dunlop; R. L. Sanders; M. W. Topping; N. A. Reddy; R. Amorin; R. Begley; M. Bolzonella; A. Calabro; A. C. Carnall; M. Castellano; A. Cimatti; M Cirasuolo; G. Cresci; A. Fontana; F. Fontanot; B. Garilli; L. Guaita; M. Hamadouche; N. P. Hathi; F. Mannucci; D. J. McLeod; L. Pentericci; A. Saxena; M. Talia; G. Zamorani

doi:10.1093/mnras/stab1340

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

F. Cullen^*
, A. E. Shapley
, R. J. McLure
, J. S. Dunlop
, R. L. Sanders
, M. W. Topping
, N. A. Reddy
, R. Amorin
, R. Begley
, M. Bolzonella
, A. Calabro
, A. C. Carnall
, M. Castellano
, A. Cimatti
, M Cirasuolo
, G. Cresci
, A. Fontana
, F. Fontanot
, B. Garilli
, L. Guaita

M. Hamadouche, N. P. Hathi, F. Mannucci, D. J. McLeod, L. Pentericci, A. Saxena, M. Talia, G. Zamorani

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We present results from the NIRVANDELS survey on the gas-phase metallicity (Z_g, 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∝M0.3⋆⁠. 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_⋆.

Original language	English
Pages (from-to)	903-920
Number of pages	18
Journal	Monthly Notices of the Royal Astronomical Society
Volume	505
Issue number	1
Early online date	12 May 2021
DOIs	https://doi.org/10.1093/mnras/stab1340
Publication status	Published - 1 Jul 2021

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astro-ph.GA

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10.1093/mnras/stab1340

2103.06300v2Accepted author manuscript, 2.97 MB

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Cullen, F., Shapley, A. E., McLure, R. J., Dunlop, J. S., Sanders, R. L., Topping, M. W., Reddy, N. A., Amorin, R., Begley, R., Bolzonella, M., Calabro, A., Carnall, A. C., Castellano, M., Cimatti, A., Cirasuolo, M., Cresci, G., Fontana, A., Fontanot, F., Garilli, B., ... Zamorani, G. (2021). The NIRVANDELS Survey: a robust detection of α-enhancement in star-forming galaxies at z ≃ 3.4. Monthly Notices of the Royal Astronomical Society , 505(1), 903-920. https://doi.org/10.1093/mnras/stab1340

@article{ee466f7d31dd47fc94b795feddab144f,

title = "The NIRVANDELS Survey:: a robust detection of α-enhancement in star-forming galaxies at z ≃ 3.4",

abstract = "We 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 {\AA}) and rest-frame optical (3400–5500 {\AA}), 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∝M0.3⋆⁠. 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⋆.",

keywords = "astro-ph.GA",

author = "F. Cullen and Shapley, \{A. E.\} and McLure, \{R. J.\} and Dunlop, \{J. S.\} and Sanders, \{R. L.\} and Topping, \{M. W.\} and Reddy, \{N. A.\} and R. Amorin and R. Begley and M. Bolzonella and A. Calabro and Carnall, \{A. C.\} and M. Castellano and A. Cimatti and M Cirasuolo and G. Cresci and A. Fontana and F. Fontanot and B. Garilli and L. Guaita and M. Hamadouche and Hathi, \{N. P.\} and F. Mannucci and McLeod, \{D. J.\} and L. Pentericci and A. Saxena and M. Talia and G. Zamorani",

note = "18 pages, 11 figures, MNRAS accepted",

year = "2021",

month = jul,

day = "1",

doi = "10.1093/mnras/stab1340",

language = "English",

volume = "505",

pages = "903--920",

journal = "Monthly Notices of the Royal Astronomical Society ",

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Cullen, F, Shapley, AE, McLure, RJ , Dunlop, JS, Sanders, RL, Topping, MW, Reddy, NA, Amorin, R, Begley, R, Bolzonella, M, Calabro, A, Carnall, AC, Castellano, M, Cimatti, A, Cirasuolo, M, Cresci, G, Fontana, A, Fontanot, F, Garilli, B, Guaita, L, Hamadouche, M, Hathi, NP, Mannucci, F, McLeod, DJ, Pentericci, L, Saxena, A, Talia, M & Zamorani, G 2021, 'The NIRVANDELS Survey: a robust detection of α-enhancement in star-forming galaxies at z ≃ 3.4', Monthly Notices of the Royal Astronomical Society , vol. 505, no. 1, pp. 903-920. https://doi.org/10.1093/mnras/stab1340

TY - JOUR

T1 - The NIRVANDELS Survey:

T2 - a robust detection of α-enhancement in star-forming galaxies at z ≃ 3.4

AU - Cullen, F.

AU - Shapley, A. E.

AU - McLure, R. J.

AU - Dunlop, J. S.

AU - Sanders, R. L.

AU - Topping, M. W.

AU - Reddy, N. A.

AU - Amorin, R.

AU - Begley, R.

AU - Bolzonella, M.

AU - Calabro, A.

AU - Carnall, A. C.

AU - Castellano, M.

AU - Cimatti, A.

AU - Cirasuolo, M

AU - Cresci, G.

AU - Fontana, A.

AU - Fontanot, F.

AU - Garilli, B.

AU - Guaita, L.

AU - Hamadouche, M.

AU - Hathi, N. P.

AU - Mannucci, F.

AU - McLeod, D. J.

AU - Pentericci, L.

AU - Saxena, A.

AU - Talia, M.

AU - Zamorani, G.

N1 - 18 pages, 11 figures, MNRAS accepted

PY - 2021/7/1

Y1 - 2021/7/1

N2 - We 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∝M0.3⋆⁠. 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⋆.

AB - We 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∝M0.3⋆⁠. 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⋆.

KW - astro-ph.GA

U2 - 10.1093/mnras/stab1340

DO - 10.1093/mnras/stab1340

M3 - Article

SN - 0035-8711

VL - 505

SP - 903

EP - 920

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

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

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