Properties of subhalos in the interacting dark matter scenario

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...

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Autores principales: Moliné, Ángeles, Schewtschenko, J. A., Sánchez Conde, Miguel A., Aguirre Santaella, Alejandra, Cora, Sofía Alejandra, Abadi, Mario G.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Astronómicas
dark matter halos; subhalos
indirect dark matter searches
cosmological model
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124029
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124029
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
dark matter halos; subhalos
indirect dark matter searches
cosmological model
spellingShingle Ciencias Astronómicas
dark matter halos; subhalos
indirect dark matter searches
cosmological model
Moliné, Ángeles
Schewtschenko, J. A.
Sánchez Conde, Miguel A.
Aguirre Santaella, Alejandra
Cora, Sofía Alejandra
Abadi, Mario G.
Properties of subhalos in the interacting dark matter scenario
topic_facet Ciencias Astronómicas
dark matter halos; subhalos
indirect dark matter searches
cosmological model
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.
format Articulo
Articulo
author Moliné, Ángeles
Schewtschenko, J. A.
Sánchez Conde, Miguel A.
Aguirre Santaella, Alejandra
Cora, Sofía Alejandra
Abadi, Mario G.
author_facet Moliné, Ángeles
Schewtschenko, J. A.
Sánchez Conde, Miguel A.
Aguirre Santaella, Alejandra
Cora, Sofía Alejandra
Abadi, Mario G.
author_sort Moliné, Ángeles
title Properties of subhalos in the interacting dark matter scenario
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
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/124029
work_keys_str_mv AT molineangeles propertiesofsubhalosintheinteractingdarkmatterscenario
AT schewtschenkoja propertiesofsubhalosintheinteractingdarkmatterscenario
AT sanchezcondemiguela propertiesofsubhalosintheinteractingdarkmatterscenario
AT aguirresantaellaalejandra propertiesofsubhalosintheinteractingdarkmatterscenario
AT corasofiaalejandra propertiesofsubhalosintheinteractingdarkmatterscenario
AT abadimariog propertiesofsubhalosintheinteractingdarkmatterscenario
bdutipo_str Repositorios
_version_ 1764820450696757248

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