Clues for the origin of the fundamental metallicity relations - I. The hierarchical building up of the structure

We analyse the evolutionary history of galaxies formed in a hierarchical scenario consistent with the concordance Lambda cold dark matter (ΛCDM) model focusing on the study of the relation between their chemical and dynamical properties. Our simulations consistently describe the formation of the str...

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Autores principales:	De Rossi, M.E., Tissera, P.B., Scannapieco, C.
Formato:	JOUR
Materias:	Cosmology: theory Galaxies: abundances Galaxies: evolution Galaxies: formation
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00358711_v374_n1_p323_DeRossi
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00358711_v374_n1_p323_DeRossi
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spelling	todo:paper_00358711_v374_n1_p323_DeRossi2023-10-03T14:46:47Z Clues for the origin of the fundamental metallicity relations - I. The hierarchical building up of the structure De Rossi, M.E. Tissera, P.B. Scannapieco, C. Cosmology: theory Galaxies: abundances Galaxies: evolution Galaxies: formation We analyse the evolutionary history of galaxies formed in a hierarchical scenario consistent with the concordance Lambda cold dark matter (ΛCDM) model focusing on the study of the relation between their chemical and dynamical properties. Our simulations consistently describe the formation of the structure and its chemical enrichment within a cosmological context. Our results indicate that the luminosity-metallicity and the stellar mass-metallicity (LZR and MZR) relations are naturally generated in a hierarchical scenario. Both relations are found to evolve with redshift. In the case of the MZR, the estimated evolution is weaker than that deduced from observational works by approximately 0.10 dex. We also determine a characteristic stellar mass, M c ≈ 3 × 1010 M⊙, which segregates the simulated galaxy population into two distinctive groups and which remains unchanged since z ∼ 3, with a very weak evolution of its metallicity content. The value and role played by Mc is consistent with the characteristic mass estimated from the SDSS galaxy survey by Kauffmann et al. Our findings suggest that systems with stellar masses smaller than Mc are responsible for the evolution of this relation at least from z ≈ 3. Larger systems are stellar dominated and have formed more than 50 per cent of their stars at z ≥ 2, showing very weak evolution since this epoch. We also found bimodal metallicity and age distributions from z ∼ 3, which reflects the existence of two different galaxy populations. Although SN feedback may affect the properties of galaxies and help to shape the MZR, it is unlikely that it will significantly modify Mc since, from z = 3 this stellar mass is found in systems with circular velocities larger than 100 km s-1. © 2006 The Authors. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00358711_v374_n1_p323_DeRossi
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Cosmology: theory Galaxies: abundances Galaxies: evolution Galaxies: formation
spellingShingle	Cosmology: theory Galaxies: abundances Galaxies: evolution Galaxies: formation De Rossi, M.E. Tissera, P.B. Scannapieco, C. Clues for the origin of the fundamental metallicity relations - I. The hierarchical building up of the structure
topic_facet	Cosmology: theory Galaxies: abundances Galaxies: evolution Galaxies: formation
description	We analyse the evolutionary history of galaxies formed in a hierarchical scenario consistent with the concordance Lambda cold dark matter (ΛCDM) model focusing on the study of the relation between their chemical and dynamical properties. Our simulations consistently describe the formation of the structure and its chemical enrichment within a cosmological context. Our results indicate that the luminosity-metallicity and the stellar mass-metallicity (LZR and MZR) relations are naturally generated in a hierarchical scenario. Both relations are found to evolve with redshift. In the case of the MZR, the estimated evolution is weaker than that deduced from observational works by approximately 0.10 dex. We also determine a characteristic stellar mass, M c ≈ 3 × 1010 M⊙, which segregates the simulated galaxy population into two distinctive groups and which remains unchanged since z ∼ 3, with a very weak evolution of its metallicity content. The value and role played by Mc is consistent with the characteristic mass estimated from the SDSS galaxy survey by Kauffmann et al. Our findings suggest that systems with stellar masses smaller than Mc are responsible for the evolution of this relation at least from z ≈ 3. Larger systems are stellar dominated and have formed more than 50 per cent of their stars at z ≥ 2, showing very weak evolution since this epoch. We also found bimodal metallicity and age distributions from z ∼ 3, which reflects the existence of two different galaxy populations. Although SN feedback may affect the properties of galaxies and help to shape the MZR, it is unlikely that it will significantly modify Mc since, from z = 3 this stellar mass is found in systems with circular velocities larger than 100 km s-1. © 2006 The Authors.
format	JOUR
author	De Rossi, M.E. Tissera, P.B. Scannapieco, C.
author_facet	De Rossi, M.E. Tissera, P.B. Scannapieco, C.
author_sort	De Rossi, M.E.
title	Clues for the origin of the fundamental metallicity relations - I. The hierarchical building up of the structure
title_short	Clues for the origin of the fundamental metallicity relations - I. The hierarchical building up of the structure
title_full	Clues for the origin of the fundamental metallicity relations - I. The hierarchical building up of the structure
title_fullStr	Clues for the origin of the fundamental metallicity relations - I. The hierarchical building up of the structure
title_full_unstemmed	Clues for the origin of the fundamental metallicity relations - I. The hierarchical building up of the structure
title_sort	clues for the origin of the fundamental metallicity relations - i. the hierarchical building up of the structure
url	http://hdl.handle.net/20.500.12110/paper_00358711_v374_n1_p323_DeRossi
work_keys_str_mv	AT derossime cluesfortheoriginofthefundamentalmetallicityrelationsithehierarchicalbuildingupofthestructure AT tisserapb cluesfortheoriginofthefundamentalmetallicityrelationsithehierarchicalbuildingupofthestructure AT scannapiecoc cluesfortheoriginofthefundamentalmetallicityrelationsithehierarchicalbuildingupofthestructure
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Clues for the origin of the fundamental metallicity relations - I. The hierarchical building up of the structure

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