Properties of subhalos in the interacting dark matter scenario
- Autores
- Moliné, Ángeles; Schewtschenko, J. A.; Sánchez Conde, Miguel A.; Aguirre Santaella, Alejandra; Cora, Sofía Alejandra; Abadi, Mario G.
- Año de publicación
- 2019
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- One possible and natural derivation from the collisionless cold dark matter (CDM) standard cosmological framework is the assumption of the existence of interactions between dark matter (DM) and photons or neutrinos. Such possible interacting dark matter (IDM) model would imply a suppression of small-scale structures due to a large collisional damping effect, even though the weakly interacting massive particle (WIMP) can still be the DM candidate. Because of this, IDM models can help alleviate alleged tensions between standard CDM predictions and observations at small mass scales. In this work, we investigate the properties of DM halo substructure or subhalos formed in a high-resolution cosmological N-body simulation specifically run within these alternative models. We also run its CDM counterpart, which allowed us to compare subhalo properties in both cosmologies. We show that, in the lower mass range covered by our simulation runs, both subhalo concentrations and abundances are systematically lower in IDM compared to the CDM scenario. Yet, as in CDM, we find that median IDM subhalo concentration values increase towards the innermost regions of their hosts for same mass subhalos. Also similarly to CDM, we find IDM subhalos to be more concentrated than field halos of the same mass. Our work has a direct application on studies aimed at the indirect detection of DM where subhalos are expected to boost the DM signal of their host halos significantly. From our results, we conclude that the role of halo substructure in DM searches will be less important in interacting scenarios than in CDM, but is nevertheless far from being negligible.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Ciencias Astronómicas
dark matter halos; subhalos
indirect dark matter searches
cosmological model - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/124029
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Properties of subhalos in the interacting dark matter scenarioMoliné, ÁngelesSchewtschenko, J. A.Sánchez Conde, Miguel A.Aguirre Santaella, AlejandraCora, Sofía AlejandraAbadi, Mario G.Ciencias Astronómicasdark matter halos; subhalosindirect dark matter searchescosmological modelOne possible and natural derivation from the collisionless cold dark matter (CDM) standard cosmological framework is the assumption of the existence of interactions between dark matter (DM) and photons or neutrinos. Such possible interacting dark matter (IDM) model would imply a suppression of small-scale structures due to a large collisional damping effect, even though the weakly interacting massive particle (WIMP) can still be the DM candidate. Because of this, IDM models can help alleviate alleged tensions between standard CDM predictions and observations at small mass scales. In this work, we investigate the properties of DM halo substructure or subhalos formed in a high-resolution cosmological N-body simulation specifically run within these alternative models. We also run its CDM counterpart, which allowed us to compare subhalo properties in both cosmologies. We show that, in the lower mass range covered by our simulation runs, both subhalo concentrations and abundances are systematically lower in IDM compared to the CDM scenario. Yet, as in CDM, we find that median IDM subhalo concentration values increase towards the innermost regions of their hosts for same mass subhalos. Also similarly to CDM, we find IDM subhalos to be more concentrated than field halos of the same mass. Our work has a direct application on studies aimed at the indirect detection of DM where subhalos are expected to boost the DM signal of their host halos significantly. From our results, we conclude that the role of halo substructure in DM searches will be less important in interacting scenarios than in CDM, but is nevertheless far from being negligible.Facultad de Ciencias Astronómicas y Geofísicas2019-09-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/124029enginfo:eu-repo/semantics/altIdentifier/issn/2075-4434info:eu-repo/semantics/altIdentifier/arxiv/1907.12531info:eu-repo/semantics/altIdentifier/doi/10.3390/galaxies7040080info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:29:33Zoai:sedici.unlp.edu.ar:10915/124029Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:29:33.62SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Properties of subhalos in the interacting dark matter scenario |
title |
Properties of subhalos in the interacting dark matter scenario |
spellingShingle |
Properties of subhalos in the interacting dark matter scenario Moliné, Ángeles Ciencias Astronómicas dark matter halos; subhalos indirect dark matter searches cosmological model |
title_short |
Properties of subhalos in the interacting dark matter scenario |
title_full |
Properties of subhalos in the interacting dark matter scenario |
title_fullStr |
Properties of subhalos in the interacting dark matter scenario |
title_full_unstemmed |
Properties of subhalos in the interacting dark matter scenario |
title_sort |
Properties of subhalos in the interacting dark matter scenario |
dc.creator.none.fl_str_mv |
Moliné, Ángeles Schewtschenko, J. A. Sánchez Conde, Miguel A. Aguirre Santaella, Alejandra Cora, Sofía Alejandra Abadi, Mario G. |
author |
Moliné, Ángeles |
author_facet |
Moliné, Ángeles Schewtschenko, J. A. Sánchez Conde, Miguel A. Aguirre Santaella, Alejandra Cora, Sofía Alejandra Abadi, Mario G. |
author_role |
author |
author2 |
Schewtschenko, J. A. Sánchez Conde, Miguel A. Aguirre Santaella, Alejandra Cora, Sofía Alejandra Abadi, Mario G. |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Ciencias Astronómicas dark matter halos; subhalos indirect dark matter searches cosmological model |
topic |
Ciencias Astronómicas dark matter halos; subhalos indirect dark matter searches cosmological model |
dc.description.none.fl_txt_mv |
One possible and natural derivation from the collisionless cold dark matter (CDM) standard cosmological framework is the assumption of the existence of interactions between dark matter (DM) and photons or neutrinos. Such possible interacting dark matter (IDM) model would imply a suppression of small-scale structures due to a large collisional damping effect, even though the weakly interacting massive particle (WIMP) can still be the DM candidate. Because of this, IDM models can help alleviate alleged tensions between standard CDM predictions and observations at small mass scales. In this work, we investigate the properties of DM halo substructure or subhalos formed in a high-resolution cosmological N-body simulation specifically run within these alternative models. We also run its CDM counterpart, which allowed us to compare subhalo properties in both cosmologies. We show that, in the lower mass range covered by our simulation runs, both subhalo concentrations and abundances are systematically lower in IDM compared to the CDM scenario. Yet, as in CDM, we find that median IDM subhalo concentration values increase towards the innermost regions of their hosts for same mass subhalos. Also similarly to CDM, we find IDM subhalos to be more concentrated than field halos of the same mass. Our work has a direct application on studies aimed at the indirect detection of DM where subhalos are expected to boost the DM signal of their host halos significantly. From our results, we conclude that the role of halo substructure in DM searches will be less important in interacting scenarios than in CDM, but is nevertheless far from being negligible. Facultad de Ciencias Astronómicas y Geofísicas |
description |
One possible and natural derivation from the collisionless cold dark matter (CDM) standard cosmological framework is the assumption of the existence of interactions between dark matter (DM) and photons or neutrinos. Such possible interacting dark matter (IDM) model would imply a suppression of small-scale structures due to a large collisional damping effect, even though the weakly interacting massive particle (WIMP) can still be the DM candidate. Because of this, IDM models can help alleviate alleged tensions between standard CDM predictions and observations at small mass scales. In this work, we investigate the properties of DM halo substructure or subhalos formed in a high-resolution cosmological N-body simulation specifically run within these alternative models. We also run its CDM counterpart, which allowed us to compare subhalo properties in both cosmologies. We show that, in the lower mass range covered by our simulation runs, both subhalo concentrations and abundances are systematically lower in IDM compared to the CDM scenario. Yet, as in CDM, we find that median IDM subhalo concentration values increase towards the innermost regions of their hosts for same mass subhalos. Also similarly to CDM, we find IDM subhalos to be more concentrated than field halos of the same mass. Our work has a direct application on studies aimed at the indirect detection of DM where subhalos are expected to boost the DM signal of their host halos significantly. From our results, we conclude that the role of halo substructure in DM searches will be less important in interacting scenarios than in CDM, but is nevertheless far from being negligible. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-09-21 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/124029 |
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http://sedici.unlp.edu.ar/handle/10915/124029 |
dc.language.none.fl_str_mv |
eng |
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eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/2075-4434 info:eu-repo/semantics/altIdentifier/arxiv/1907.12531 info:eu-repo/semantics/altIdentifier/doi/10.3390/galaxies7040080 |
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