Baryons and dark matter halo distributions in ACDM cosmology

We analyse the dark matter (DM) distribution in a ≈ 10 M ⊙alo extracted from a simulation consistent with the concordance cosmology, where the physics regulating the transformation of gas into stars was allowed to change producing galaxies with different morphologies. Although the DM profiles get mo...

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Autores principales: Pedrosa, S., Tissera, P., Scannapieco, C.
Formato: SER
Materias:
Cosmology: dark matter
Galaxies: halos
Galaxies: structure
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_17439213_v5_nS262_p404_Pedrosa
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_17439213_v5_nS262_p404_Pedrosa
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spelling todo:paper_17439213_v5_nS262_p404_Pedrosa2023-10-03T16:31:32Z Baryons and dark matter halo distributions in ACDM cosmology Pedrosa, S. Tissera, P. Scannapieco, C. Cosmology: dark matter Galaxies: halos Galaxies: structure We analyse the dark matter (DM) distribution in a ≈ 10 M ⊙alo extracted from a simulation consistent with the concordance cosmology, where the physics regulating the transformation of gas into stars was allowed to change producing galaxies with different morphologies. Although the DM profiles get more concentrated as baryons are collected at the centre of the haloes compared to a pure dynamical run, the total baryonic mass alone is not enough to fully predict the reaction of the DM profile. Our findings suggest that the response of the DM halo is driven by the history of assembly of baryons into a galaxy. The accretion of satellites could be associated with an expansion of the dark matter profiles, triggered by angular momentum transfer from the incoming satellites. However, we also found that these mechanism have different efficiencies which are set by the history of formation of the structure. © International Astronomical Union 2010. SER info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_17439213_v5_nS262_p404_Pedrosa
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: dark matter
Galaxies: halos
Galaxies: structure
spellingShingle Cosmology: dark matter
Galaxies: halos
Galaxies: structure
Pedrosa, S.
Tissera, P.
Scannapieco, C.
Baryons and dark matter halo distributions in ACDM cosmology
topic_facet Cosmology: dark matter
Galaxies: halos
Galaxies: structure
description We analyse the dark matter (DM) distribution in a ≈ 10 M ⊙alo extracted from a simulation consistent with the concordance cosmology, where the physics regulating the transformation of gas into stars was allowed to change producing galaxies with different morphologies. Although the DM profiles get more concentrated as baryons are collected at the centre of the haloes compared to a pure dynamical run, the total baryonic mass alone is not enough to fully predict the reaction of the DM profile. Our findings suggest that the response of the DM halo is driven by the history of assembly of baryons into a galaxy. The accretion of satellites could be associated with an expansion of the dark matter profiles, triggered by angular momentum transfer from the incoming satellites. However, we also found that these mechanism have different efficiencies which are set by the history of formation of the structure. © International Astronomical Union 2010.
format SER
author Pedrosa, S.
Tissera, P.
Scannapieco, C.
author_facet Pedrosa, S.
Tissera, P.
Scannapieco, C.
author_sort Pedrosa, S.
title Baryons and dark matter halo distributions in ACDM cosmology
title_short Baryons and dark matter halo distributions in ACDM cosmology
title_full Baryons and dark matter halo distributions in ACDM cosmology
title_fullStr Baryons and dark matter halo distributions in ACDM cosmology
title_full_unstemmed Baryons and dark matter halo distributions in ACDM cosmology
title_sort baryons and dark matter halo distributions in acdm cosmology
url http://hdl.handle.net/20.500.12110/paper_17439213_v5_nS262_p404_Pedrosa
work_keys_str_mv AT pedrosas baryonsanddarkmatterhalodistributionsinacdmcosmology
AT tisserap baryonsanddarkmatterhalodistributionsinacdmcosmology
AT scannapiecoc baryonsanddarkmatterhalodistributionsinacdmcosmology
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