Modelling satellite galaxies in semi-analytical models

Understanding the evolution of satellite halos is important in predicting the abundance of dark matter subhalos and satellite galaxies. However, in numerical simulations of structure formation, spurious disruptions can occur that make the halos of some galaxies no longer detectable. Those galaxies t...

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Autores principales: Delfino, F. M., Scóccola, Claudia Graciela, Vega Martínez, Cristian Antonio, Cora, Sofía Alejandra
Formato: Articulo
Lenguaje:Español
Publicado: 2021
Materias:
Ciencias Astronómicas
galaxies: formation
galaxies: evolution
galaxies: halos
methods: numerical
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/175994
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-175994
record_format dspace
spelling I19-R120-10915-1759942025-01-31T20:04:29Z http://sedici.unlp.edu.ar/handle/10915/175994 Modelling satellite galaxies in semi-analytical models Delfino, F. M. Scóccola, Claudia Graciela Vega Martínez, Cristian Antonio Cora, Sofía Alejandra 2021 2025-01-31T18:15:42Z es Ciencias Astronómicas galaxies: formation galaxies: evolution galaxies: halos methods: numerical Understanding the evolution of satellite halos is important in predicting the abundance of dark matter subhalos and satellite galaxies. However, in numerical simulations of structure formation, spurious disruptions can occur that make the halos of some galaxies no longer detectable. Those galaxies that have lost their host dark matter halo are called “orphan galaxies”. In this work, we consider a model for the evolution of the orbits of orphan galaxies, which takes into account the effects of both dynamical friction and tidal forces. We propose to use the two-point correlation function and the halo mass function of a high-resolution A-body simulation to constrain the free parameters of the model. Entender la evolución de los halos satélites es importante para predecir la abundancia de subhalos de materia oscura y galaxias satélite. Sin embargo, en simulaciones numéricas de formación de estructura, pueden producirse disrupciones espurias que hacen que los halos de algunas galaxias no sean detectados. A estas galaxias que han perdido su halo de materia oscura se las denomina “galaxias huérfanas”. En este trabajo, consideramos un modelo para la evolución de las órbitas de las galaxias huérfanas, que tiene en cuenta tanto los efectos de fricción dinámica como los de las fuerzas de marea. Se propone utilizar la función de correlación de dos puntos y la función de masa de halos de una simulación de A-cuerpos de alta resolución para acotar los parámetros libres del modelo. 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 222-224
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Ciencias Astronómicas
galaxies: formation
galaxies: evolution
galaxies: halos
methods: numerical
spellingShingle Ciencias Astronómicas
galaxies: formation
galaxies: evolution
galaxies: halos
methods: numerical
Delfino, F. M.
Scóccola, Claudia Graciela
Vega Martínez, Cristian Antonio
Cora, Sofía Alejandra
Modelling satellite galaxies in semi-analytical models
topic_facet Ciencias Astronómicas
galaxies: formation
galaxies: evolution
galaxies: halos
methods: numerical
description Understanding the evolution of satellite halos is important in predicting the abundance of dark matter subhalos and satellite galaxies. However, in numerical simulations of structure formation, spurious disruptions can occur that make the halos of some galaxies no longer detectable. Those galaxies that have lost their host dark matter halo are called “orphan galaxies”. In this work, we consider a model for the evolution of the orbits of orphan galaxies, which takes into account the effects of both dynamical friction and tidal forces. We propose to use the two-point correlation function and the halo mass function of a high-resolution A-body simulation to constrain the free parameters of the model.
format Articulo
Articulo
author Delfino, F. M.
Scóccola, Claudia Graciela
Vega Martínez, Cristian Antonio
Cora, Sofía Alejandra
author_facet Delfino, F. M.
Scóccola, Claudia Graciela
Vega Martínez, Cristian Antonio
Cora, Sofía Alejandra
author_sort Delfino, F. M.
title Modelling satellite galaxies in semi-analytical models
title_short Modelling satellite galaxies in semi-analytical models
title_full Modelling satellite galaxies in semi-analytical models
title_fullStr Modelling satellite galaxies in semi-analytical models
title_full_unstemmed Modelling satellite galaxies in semi-analytical models
title_sort modelling satellite galaxies in semi-analytical models
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/175994
work_keys_str_mv AT delfinofm modellingsatellitegalaxiesinsemianalyticalmodels
AT scoccolaclaudiagraciela modellingsatellitegalaxiesinsemianalyticalmodels
AT vegamartinezcristianantonio modellingsatellitegalaxiesinsemianalyticalmodels
AT corasofiaalejandra modellingsatellitegalaxiesinsemianalyticalmodels
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