The elemental abundance of quiescent galaxies in the LEGA-C survey: the (non-)evolution of [α/Fe] from <i>z</i> = 0.75 to <i>z</i> = 0-Reference-Cited by-同舟云学术

The elemental abundance of quiescent galaxies in the LEGA-C survey: the (non-)evolution of [α/Fe] from z = 0.75 to z = 0

Published:2023-08-31 Issue:3 Volume:525 Page:4219-4230
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Bevacqua Davide¹²^ORCID,Saracco Paolo¹^ORCID,La Barbera Francesco³,D’Ago Giuseppe⁴^ORCID,De Propris Roberto⁵⁶^ORCID,Ferreras Ignacio⁷⁸⁹^ORCID,Gallazzi Anna¹⁰^ORCID,Pasquali Anna¹¹^ORCID,Spiniello Chiara³¹²

Affiliation:

1. INAF - Osservatorio Astronomico di Brera , via Brera 28, I-20121 Milano , Italy

2. DiSAT, Universitá degli Studi dell’Insubria , via Valleggio 11, I-22100 Como , Italy

3. INAF - Osservatorio Astronomico di Capodimonte , Via Moiariello 16, I-80131 Naples , Italy

4. Instituto de Astrofísica, Pontificia Universidad Católica de Chile , Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago , Chile

5. FINCA, University of Turku , Vesilinnantie 5, FI-20014 Turku , Finland

6. Department of Physics and Astronomy, Botswana International University of Science and Technology , Private Bag 16, Palapye, Plot 1007 , Botswana

7. Instituto de Astrofisica de Canarias , Calle Vía Lactea s/n, E-38205 La Laguna, Tenerife , Spain

8. Department of Physics and Astronomy, University College London , London WC1E 6BT , UK

9. Departamento de Astrofisica, Universidad de La Laguna , E-38206 La Laguna, Tenerife , Spain

10. INAF - Osservatorio Astrofisico di Arcetri , Largo Enrico Fermi5, I-50125 Firenze , Italy

11. Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg , Mönchhofstrasse 12 - 14, D-69120 Heidelberg , Germany

12. Sub-Department of Astrophysics, Department of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford OX1 3RH , UK

Abstract

ABSTRACT We measure the [α/Fe] abundances for 183 quiescent galaxies at z = 0.60−0.75 with stellar masses ranging 10.4 ≤ log10(M*/M⊙) ≤ 11.6 selected from the Large Early Galaxy Astrophysics Census survey. We estimate [α/Fe] from the ratio of the spectral indices Mgb (λ ∼ 5177 Å) and Fe4383, compared to predictions of simple stellar population models. We find that 91 per cent of quiescents in our sample have supersolar [α/Fe], with an average value of [α/Fe] = +0.24 ± 0.01. We find no significant correlation between [α/Fe] and stellar metallicity, mass, velocity dispersion, and average formation time. Galaxies that formed the bulk of their stellar mass on time-scales shorter than 1 Gyr follow the same [α/Fe] distribution as those which formed on longer time-scales. In comparison to local early-type galaxies and to stacked spectra of quiescent galaxies at z = 0.38 and z = 0.07, we find that the average [α/Fe] has not changed between z = 0.75 and the present time. Our work shows that the vast majority of massive quiescent galaxies at z ∼ 0.7 are α-enhanced, and that no detectable evolution of the average [α/Fe] has taken place over the last ∼6.5 Gyr.

Funder

INAF

Hintze Family Charitable Foundation

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Link

https://academic.oup.com/mnras/article-pdf/525/3/4219/51754692/stad2403.pdf

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5. From Carbon to Cobalt: Chemical Compositions and Ages of z ∼ 0.7 Quiescent Galaxies