The effect of gas accretion on the radial gas metallicity profile of simulated galaxies

We study the effect of the gas accretion rate (M<sub>accr</sub>) on the radial gas metallicity profile (RMP) of galaxies using the EAGLE cosmological hydrodynamic simulations, focusing on central galaxies of stellar mass M⋆ ≳ 109 M<sub>⊙</sub> at z ≤ 1. We find clear relation...

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Autores principales: Collacchioni, Florencia, Lagos, Claudia D. P., Mitchell, Peter D., Schaye, Joop, Wisnioski, Emily, Cora, Sofía Alejandra, Correa, Camila A.
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2020
Materias:
Ciencias Astronómicas
Methods: numerical
Galaxies: evolution
Galaxies: formation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/125345
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-125345
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Methods: numerical
Galaxies: evolution
Galaxies: formation
spellingShingle Ciencias Astronómicas
Methods: numerical
Galaxies: evolution
Galaxies: formation
Collacchioni, Florencia
Lagos, Claudia D. P.
Mitchell, Peter D.
Schaye, Joop
Wisnioski, Emily
Cora, Sofía Alejandra
Correa, Camila A.
The effect of gas accretion on the radial gas metallicity profile of simulated galaxies
topic_facet Ciencias Astronómicas
Methods: numerical
Galaxies: evolution
Galaxies: formation
description We study the effect of the gas accretion rate (M<sub>accr</sub>) on the radial gas metallicity profile (RMP) of galaxies using the EAGLE cosmological hydrodynamic simulations, focusing on central galaxies of stellar mass M⋆ ≳ 109 M<sub>⊙</sub> at z ≤ 1. We find clear relations between ˙ M accr and the slope of the RMP (measured within an effective radius), where higher ˙M<sub>accr</sub> are associated with more negative slopes. The slope of the RMPs depends more strongly on M<sub>accr</sub> than on stellar mass, star formation rate (SFR), or gas fraction, suggesting M<sub>accr</sub> to be a more fundamental driver of the RMP slope of galaxies. We find that eliminating the dependence on stellar mass is essential for pinning down the properties that shape the slope of the RMP. Although ˙M<sub>accr</sub> is the main property modulating the slope of the RMP, we find that it causes other correlations that are more easily testable observationally: At fixed stellar mass, galaxies with more negative RMP slopes tend to have higher gas fractions and SFRs, while galaxies with lower gas fractions and SFRs tend to have flatter metallicity profiles within an effective radius.
format Articulo
Preprint
author Collacchioni, Florencia
Lagos, Claudia D. P.
Mitchell, Peter D.
Schaye, Joop
Wisnioski, Emily
Cora, Sofía Alejandra
Correa, Camila A.
author_facet Collacchioni, Florencia
Lagos, Claudia D. P.
Mitchell, Peter D.
Schaye, Joop
Wisnioski, Emily
Cora, Sofía Alejandra
Correa, Camila A.
author_sort Collacchioni, Florencia
title The effect of gas accretion on the radial gas metallicity profile of simulated galaxies
title_short The effect of gas accretion on the radial gas metallicity profile of simulated galaxies
title_full The effect of gas accretion on the radial gas metallicity profile of simulated galaxies
title_fullStr The effect of gas accretion on the radial gas metallicity profile of simulated galaxies
title_full_unstemmed The effect of gas accretion on the radial gas metallicity profile of simulated galaxies
title_sort effect of gas accretion on the radial gas metallicity profile of simulated galaxies
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/125345
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