Chemical abundance patterns in Local Group galaxies within cosmological simulations

In the context of the concordance cosmology, structure formation in the universe is the result of the amplification, by gravitational effects, of small perturbations in the primeval density field. This results in the formation of structures known as dark matter haloes, where gas collapses and forms...

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Detalles Bibliográficos
Autores principales:	Biaus, L., Scannapieco, C., Nuza, S. E.
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2021
Materias:	Ciencias Astronómicas galaxies: structure galaxies: abundances methods: numerical
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/168929
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-168929
record_format	dspace
spelling	I19-R120-10915-1689292024-08-22T20:02:15Z http://sedici.unlp.edu.ar/handle/10915/168929 Chemical abundance patterns in Local Group galaxies within cosmological simulations Biaus, L. Scannapieco, C. Nuza, S. E. 2021 2024-08-22T16:24:23Z en Ciencias Astronómicas galaxies: structure galaxies: abundances methods: numerical In the context of the concordance cosmology, structure formation in the universe is the result of the amplification, by gravitational effects, of small perturbations in the primeval density field. This results in the formation of structures known as dark matter haloes, where gas collapses and forms stars, giving birth to galaxies. Numerical simulations are an important tool in the theoretical study of galaxy formation and evolution. In the present work, we describe the implementation of a chemical enrichment model in a state-of-the-art cosmological simulation of the Local Group. The simulation includes sub-grid models for the most relevant physical processes. We analyze the chemical and morphological evolution of two galaxies with virial masses similar to that of our Milky Way. For each of the stellar components (disc, bulge and halo), we establish links between their formation history and their chemical evolution. We find that α-element (O, Mg, Si) enrichment happens at early stages of evolution, as their main producers are short-lived stars which end their lives as type II supernova explosions. There is also a gradual contamination with the rest of the elements as type la supernovae and winds of stars in the asymptotic giant branch occur. En el contexto del modelo cosmológico de concordancia, la formación de estructura en el universo es el resultado de la amplificación, por efectos gravitatorios, de pequeñas perturbaciones en el campo de densidad primigenio. Esto resulta en la formación de estructuras conocidas como halos de materia oscura, donde el gas colapsa y forma estrellas, dando lugar a galaxias. Las simulaciones numéricas son una herramienta importante en el estudio teórico de la formación y evolución de galaxias. En este trabajo describimos la implementación de un modelo de enriquecimiento químico en simulaciones cosmológicas del Grupo Local de última generación. Estas incluyen modelos de subgrilla para los procesos físicos más relevantes. Analizamos la evolución química y morfológica de dos galaxias con masas viriales similares a nuestra Vía Láctea. Para cada una de las componentes estelares (disco, bulbo y halo), establecemos conexiones entre su historia de formación y su evolución química. Encontramos que el enriquecimiento de elementos a (O, Mg, Si) ocurre en etapas tempranas de la evolución, pues sus principales productoras son estrellas de vida corta que devienen en explosiones de supernova tipo II. Hay también una contaminación gradual del resto de los elementos a medida que ocurren supernovas de tipo la y vientos de estrellas en la fase asintótica gigante. Asociación Argentina de Astronomía Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 149-151
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Astronómicas galaxies: structure galaxies: abundances methods: numerical
spellingShingle	Ciencias Astronómicas galaxies: structure galaxies: abundances methods: numerical Biaus, L. Scannapieco, C. Nuza, S. E. Chemical abundance patterns in Local Group galaxies within cosmological simulations
topic_facet	Ciencias Astronómicas galaxies: structure galaxies: abundances methods: numerical
description	In the context of the concordance cosmology, structure formation in the universe is the result of the amplification, by gravitational effects, of small perturbations in the primeval density field. This results in the formation of structures known as dark matter haloes, where gas collapses and forms stars, giving birth to galaxies. Numerical simulations are an important tool in the theoretical study of galaxy formation and evolution. In the present work, we describe the implementation of a chemical enrichment model in a state-of-the-art cosmological simulation of the Local Group. The simulation includes sub-grid models for the most relevant physical processes. We analyze the chemical and morphological evolution of two galaxies with virial masses similar to that of our Milky Way. For each of the stellar components (disc, bulge and halo), we establish links between their formation history and their chemical evolution. We find that α-element (O, Mg, Si) enrichment happens at early stages of evolution, as their main producers are short-lived stars which end their lives as type II supernova explosions. There is also a gradual contamination with the rest of the elements as type la supernovae and winds of stars in the asymptotic giant branch occur.
format	Articulo Articulo
author	Biaus, L. Scannapieco, C. Nuza, S. E.
author_facet	Biaus, L. Scannapieco, C. Nuza, S. E.
author_sort	Biaus, L.
title	Chemical abundance patterns in Local Group galaxies within cosmological simulations
title_short	Chemical abundance patterns in Local Group galaxies within cosmological simulations
title_full	Chemical abundance patterns in Local Group galaxies within cosmological simulations
title_fullStr	Chemical abundance patterns in Local Group galaxies within cosmological simulations
title_full_unstemmed	Chemical abundance patterns in Local Group galaxies within cosmological simulations
title_sort	chemical abundance patterns in local group galaxies within cosmological simulations
publishDate	2021
url	http://sedici.unlp.edu.ar/handle/10915/168929
work_keys_str_mv	AT biausl chemicalabundancepatternsinlocalgroupgalaxieswithincosmologicalsimulations AT scannapiecoc chemicalabundancepatternsinlocalgroupgalaxieswithincosmologicalsimulations AT nuzase chemicalabundancepatternsinlocalgroupgalaxieswithincosmologicalsimulations
_version_	1809234832890265600

Chemical abundance patterns in Local Group galaxies within cosmological simulations

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