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Correlations between mass, stellar kinematics, and gas metallicity in eagle galaxies

Theuns, T.; Lara-López, M.A.; De Rossi, M.E.; Zenocratti, L.J.

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Authors

M.A. Lara-López

M.E. De Rossi

L.J. Zenocratti



Abstract

The metallicity of star-forming gas in galaxies from the EAGLE (Evolution and Assembly of GaLaxies and their Environments) simulations increases with stellar mass. Here, we investigate whether the scatter around this relation correlates with morphology and/or stellar kinematics. At redshift z = 0, galaxies with more rotational support have lower metallicities on average when the stellar mass is below M⋆ ≈ 1010 M⊙. This trend inverts at higher values of M⋆, when prolate galaxies show typically lower metallicity. At increasing redshifts, the trend between rotational support and metallicity becomes weaker at low stellar mass but more pronounced at high stellar mass. We argue that the secondary dependence of metallicity on stellar kinematics is another manifestation of the observed anticorrelation between metallicity and star formation rate at a given stellar mass. At low masses, such trends seem to be driven by the different star formation histories of galaxies and stellar feedback. At high masses, feedback from active galactic nuclei and galaxy mergers plays a dominant role.

Citation

Theuns, T., Lara-López, M., De Rossi, M., & Zenocratti, L. (2020). Correlations between mass, stellar kinematics, and gas metallicity in eagle galaxies. Monthly Notices of the Royal Astronomical Society: Letters, 496(1), L33-L37. https://doi.org/10.1093/mnrasl/slaa085

Journal Article Type Article
Acceptance Date May 5, 2020
Online Publication Date May 15, 2020
Publication Date 2020-07
Deposit Date Jul 8, 2020
Publicly Available Date Jul 8, 2020
Journal Monthly Notices of the Royal Astronomical Society: Letters
Electronic ISSN 1745-3933
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 496
Issue 1
Pages L33-L37
DOI https://doi.org/10.1093/mnrasl/slaa085
Public URL https://durham-repository.worktribe.com/output/1298466

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Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. ©: 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.






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