The cosmic buildup of dust and metals: Accurate abundances from GRB-selected star-forming galaxies at 1.7 < z < 6.3

K. E. Heintz, A. De Cia, C. C. Thöne, J. K. Krogager, R. M. Yates, S. Vejlgaard, C. Konstantopoulou, J. P.U. Fynbo, D. Watson, D. Narayanan, S. N. Wilson, M. Arabsalmani, S. Campana, V. D'Elia, M. De Pasquale, D. H. Hartmann, L. Izzo, P. Jakobsson, C. Kouveliotou, A. LevanQ. Li, D. B. Malesani, A. Melandri, B. Milvang-Jensen, P. Møller, E. Palazzi, J. Palmerio, P. Petitjean, G. Pugliese, A. Rossi, A. Saccardi, R. Salvaterra, S. Savaglio, P. Schady, G. Stratta, N. R. Tanvir, A. De Ugarte Postigo, S. D. Vergani, K. Wiersema, R. A.M.J. Wijers, T. Zafar

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4 Citations (SciVal)

Abstract

The chemical enrichment of dust and metals in the interstellar medium of galaxies throughout cosmic time is one of the key driving processes of galaxy evolution. Here we study the evolution of the gas-phase metallicities, dust-to-gas (DTG) ratios, and dust-to-metal (DTM) ratios of 36 star-forming galaxies at 1.7 < z < 6.3 probed by gamma-ray bursts (GRBs). We compiled all GRB-selected galaxies with intermediate- ( = 7000) to high-resolution ( > 40 000) spectroscopic data, including three new sources, for which at least one refractory (e.g., Fe) and one volatile (e.g., S or Zn) element have been detected at S/N > 3. This is to ensure that accurate abundances and dust depletion patterns can be obtained. We first derived the redshift evolution of the dust-corrected, absorption-line-based gas-phase metallicity, [M/H]tot, in these galaxies, for which we determine a linear relation with redshift [M/H]tot(z) = (- 0.21 ± 0.04)z - (0.47 ± 0.14). We then examined the DTG and DTM ratios as a function of redshift and through three orders of magnitude in metallicity, quantifying the relative dust abundance both through the direct line-of-sight visual extinction, AV, and the derived depletion level. We used a novel method to derive the DTG and DTM mass ratios for each GRB sightline, summing up the mass of all the depleted elements in the dust phase. We find that the DTG and DTM mass ratios are both strongly correlated with the gas-phase metallicity and show a mild evolution with redshift as well. While these results are subject to a variety of caveats related to the physical environments and the narrow pencil-beam sightlines through the interstellar medium probed by the GRBs, they provide strong implications for studies of dust masses that aim to infer the gas and metal content of high-redshift galaxies, and particularly demonstrate the large offset from the average Galactic value in the low-metallicity, high-redshift regime.

Original languageEnglish
Article numberA91
Number of pages15
JournalAstronomy and Astrophysics
Volume679
DOIs
Publication statusPublished - 30 Nov 2023

Funding

First and foremost, we would like to thank all the astronomers around the globe that have been on duty throughout the years, tirelessly following up GRBs, which resulted in this exquisite GRB spectroscopic afterglow legacy sample. K.E.H. acknowledges support from the Carlsberg Foundation Reintegration Fellowship Grant CF21-0103. The Cosmic Dawn Center (DAWN) is funded by the Danish National Research Foundation under grant No. 140. A.D.C. and C.K. acknowledge support by the Swiss National Science Foundation under grant 185692. AR acknowledges support from the INAF project Premiale Supporto Arizona & Italia. A.S. and S.D.V. acknowledge support from CNES and DIM-ACAV+. G.S. acknowledges the support by the State of Hesse within the Research Cluster ELEMENTS (Project ID 500/10.006) Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere.

FundersFunder number
Southern Hemisphere
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung185692
Danmarks Grundforskningsfond140
CarlsbergfondetCF21-0103
Centre National d'Etudes Spatiales500/10.006
INAF-Istituto di Astrofisica e Planetologia Spaziali

    Keywords

    • Dust
    • Extinction
    • Galaxies: abundances
    • Galaxies: high-redshift
    • Galaxies: ISM
    • Gamma-ray burst: general
    • ISM: abundances

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

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