Analysis of the very inner Milky Way dark matter distribution and gamma-ray signals

We analyze the possibility that the HESS γ-ray source at the Galactic center could be explained as the secondary flux produced by annihilation of TeV dark matter (DM) particles with locally enhanced density, in a region spatially compatible with the HESS observations themselves. We study the inner 1...

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Detalhes bibliográficos
Autores: Gammaldi, Viviana, Ávila-Reese, V., Valenzuela, O., González-Morales, A.X.
Formato: artículo
Fecha de publicación:2016
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/17767
Acesso em linha:https://hdl.handle.net/20.500.14352/17767
Access Level:acceso abierto
Palavra-chave:53
Galactic-center
High-energy
Cosmological simulations
Contraction
Direction
Galaxies
Baryons
Cores
Halos
Mass
Física-Modelos matemáticos
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network_acronym_str ES
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repository_id_str
spelling Analysis of the very inner Milky Way dark matter distribution and gamma-ray signalsGammaldi, VivianaÁvila-Reese, V.Valenzuela, O.González-Morales, A.X.53Galactic-centerHigh-energyCosmological simulationsContractionDirectionGalaxiesBaryonsCoresHalosMassFísica-Modelos matemáticosWe analyze the possibility that the HESS γ-ray source at the Galactic center could be explained as the secondary flux produced by annihilation of TeV dark matter (DM) particles with locally enhanced density, in a region spatially compatible with the HESS observations themselves. We study the inner 100 pc considering (i) the extrapolation of several density profiles from state-of-the-art N-body þ hydrodynamics simulations of Milky Way-like galaxies, (ii) the DM spike induced by the black hole, and (iii) the DM particles scattering off by bulge stars. We show that in some cases the DM spike may provide the enhancement in the flux required to explain the cutoff in the HESS J1745-290γ-ray spectra as TeV DM. In other cases, it may help to describe the spatial tail reported by HESS II at angular scales ≲0.54° toward Sgr A*.Amer Physical SocUniversidad Complutense de Madrid20162016-12-2220162016-12-22journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/17767reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/177672026-06-02T12:44:21Z
dc.title.none.fl_str_mv Analysis of the very inner Milky Way dark matter distribution and gamma-ray signals
title Analysis of the very inner Milky Way dark matter distribution and gamma-ray signals
spellingShingle Analysis of the very inner Milky Way dark matter distribution and gamma-ray signals
Gammaldi, Viviana
53
Galactic-center
High-energy
Cosmological simulations
Contraction
Direction
Galaxies
Baryons
Cores
Halos
Mass
Física-Modelos matemáticos
title_short Analysis of the very inner Milky Way dark matter distribution and gamma-ray signals
title_full Analysis of the very inner Milky Way dark matter distribution and gamma-ray signals
title_fullStr Analysis of the very inner Milky Way dark matter distribution and gamma-ray signals
title_full_unstemmed Analysis of the very inner Milky Way dark matter distribution and gamma-ray signals
title_sort Analysis of the very inner Milky Way dark matter distribution and gamma-ray signals
dc.creator.none.fl_str_mv Gammaldi, Viviana
Ávila-Reese, V.
Valenzuela, O.
González-Morales, A.X.
author Gammaldi, Viviana
author_facet Gammaldi, Viviana
Ávila-Reese, V.
Valenzuela, O.
González-Morales, A.X.
author_role author
author2 Ávila-Reese, V.
Valenzuela, O.
González-Morales, A.X.
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 53
Galactic-center
High-energy
Cosmological simulations
Contraction
Direction
Galaxies
Baryons
Cores
Halos
Mass
Física-Modelos matemáticos
topic 53
Galactic-center
High-energy
Cosmological simulations
Contraction
Direction
Galaxies
Baryons
Cores
Halos
Mass
Física-Modelos matemáticos
description We analyze the possibility that the HESS γ-ray source at the Galactic center could be explained as the secondary flux produced by annihilation of TeV dark matter (DM) particles with locally enhanced density, in a region spatially compatible with the HESS observations themselves. We study the inner 100 pc considering (i) the extrapolation of several density profiles from state-of-the-art N-body þ hydrodynamics simulations of Milky Way-like galaxies, (ii) the DM spike induced by the black hole, and (iii) the DM particles scattering off by bulge stars. We show that in some cases the DM spike may provide the enhancement in the flux required to explain the cutoff in the HESS J1745-290γ-ray spectra as TeV DM. In other cases, it may help to describe the spatial tail reported by HESS II at angular scales ≲0.54° toward Sgr A*.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-12-22
2016
2016-12-22
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/17767
url https://hdl.handle.net/20.500.14352/17767
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Amer Physical Soc
publisher.none.fl_str_mv Amer Physical Soc
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869412940542640128
score 15,300719

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