Prospects for a Dark Matter Annihilation Signal toward the Sagittarius Dwarf Galaxy with Ground-based Cherenkov telescopes

Autores
Viana, A.; Medina, Maria Clementina; Peñarrubia, J.; Brun, P.; Glicenstein, J.F.; Kosack, K.; Moulin, E.; Naumann Godo, M.; Peyaud, B.
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Dwarf galaxies are widely believed to be among the best targets for indirect dark matter searches using high-energy gamma rays; and indeed gamma-ray emission from these objects has long been a subject of detailed study for ground- based atmospheric Cherenkov telescopes. Here, we update current exclusion limits obtained on the closest dwarf, the Sagittarius dwarf galaxy, in light of re- cent realistic dark matter halo models. The constraints on the velocity-weighted annihilation cross section of the dark matter particle are of a few 10−23 cm^3 s^{−1} in the TeV energy range for a 50 h exposure. The limits are extrapolated to the sensitivities of future Cherenkov Telescope Arrays. For 200 h of observation time, the sensitivity at 95% C.L. reaches 10−25 cm^3 s^{−1} . Possible astrophysical back- grounds from gamma-ray sources dissembled in Sagittarius dwarf are studied. It is shown that with long-enough observation times, gamma-ray background from millisecond pulsars in a globular cluster contained within Sagittarius dwarf may" "limit the sensitivity to dark matter annihilations.
Fil: Viana, A.. Institute of Research into the Fundamental Laws of the Universe; Francia
Fil: Medina, Maria Clementina. Institute of Research into the Fundamental Laws of the Universe; Francia. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomia; Argentina
Fil: Peñarrubia, J.. University of Cambridge; Reino Unido
Fil: Brun, P.. Institute of Research into the Fundamental Laws of the Universe; Francia
Fil: Glicenstein, J.F.. Institute of Research into the Fundamental Laws of the Universe; Francia
Fil: Kosack, K.. Institute of Research into the Fundamental Laws of the Universe; Francia
Fil: Moulin, E.. Institute of Research into the Fundamental Laws of the Universe; Francia
Fil: Naumann Godo, M.. Institute of Research into the Fundamental Laws of the Universe; Francia
Fil: Peyaud, B.. Institute of Research into the Fundamental Laws of the Universe; Francia
Materia
Gamma Rays
Dwarf Spheroidal Galaxy
Dark Matter
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/17192
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/17192
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Prospects for a Dark Matter Annihilation Signal toward the Sagittarius Dwarf Galaxy with Ground-based Cherenkov telescopesViana, A.Medina, Maria ClementinaPeñarrubia, J.Brun, P.Glicenstein, J.F.Kosack, K.Moulin, E.Naumann Godo, M.Peyaud, B.Gamma RaysDwarf Spheroidal GalaxyDark Matterhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Dwarf galaxies are widely believed to be among the best targets for indirect dark matter searches using high-energy gamma rays; and indeed gamma-ray emission from these objects has long been a subject of detailed study for ground- based atmospheric Cherenkov telescopes. Here, we update current exclusion limits obtained on the closest dwarf, the Sagittarius dwarf galaxy, in light of re- cent realistic dark matter halo models. The constraints on the velocity-weighted annihilation cross section of the dark matter particle are of a few 10−23 cm^3 s^{−1} in the TeV energy range for a 50 h exposure. The limits are extrapolated to the sensitivities of future Cherenkov Telescope Arrays. For 200 h of observation time, the sensitivity at 95% C.L. reaches 10−25 cm^3 s^{−1} . Possible astrophysical back- grounds from gamma-ray sources dissembled in Sagittarius dwarf are studied. It is shown that with long-enough observation times, gamma-ray background from millisecond pulsars in a globular cluster contained within Sagittarius dwarf may" "limit the sensitivity to dark matter annihilations.Fil: Viana, A.. Institute of Research into the Fundamental Laws of the Universe; FranciaFil: Medina, Maria Clementina. Institute of Research into the Fundamental Laws of the Universe; Francia. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomia; ArgentinaFil: Peñarrubia, J.. University of Cambridge; Reino UnidoFil: Brun, P.. Institute of Research into the Fundamental Laws of the Universe; FranciaFil: Glicenstein, J.F.. Institute of Research into the Fundamental Laws of the Universe; FranciaFil: Kosack, K.. Institute of Research into the Fundamental Laws of the Universe; FranciaFil: Moulin, E.. Institute of Research into the Fundamental Laws of the Universe; FranciaFil: Naumann Godo, M.. Institute of Research into the Fundamental Laws of the Universe; FranciaFil: Peyaud, B.. Institute of Research into the Fundamental Laws of the Universe; FranciaIop Publishing2012-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/17192Viana, A.; Medina, Maria Clementina; Peñarrubia, J.; Brun, P.; Glicenstein, J.F.; et al.; Prospects for a Dark Matter Annihilation Signal toward the Sagittarius Dwarf Galaxy with Ground-based Cherenkov telescopes; Iop Publishing; Astrophysical Journal; 746; 2-2012; 77-900004-637Xenginfo:eu-repo/semantics/altIdentifier/url/http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1103.2627info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-637X/746/1/77/metainfo:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/746/1/77info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:54:27Zoai:ri.conicet.gov.ar:11336/17192instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:54:27.982CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Prospects for a Dark Matter Annihilation Signal toward the Sagittarius Dwarf Galaxy with Ground-based Cherenkov telescopes
title Prospects for a Dark Matter Annihilation Signal toward the Sagittarius Dwarf Galaxy with Ground-based Cherenkov telescopes
spellingShingle Prospects for a Dark Matter Annihilation Signal toward the Sagittarius Dwarf Galaxy with Ground-based Cherenkov telescopes
Viana, A.
Gamma Rays
Dwarf Spheroidal Galaxy
Dark Matter
title_short Prospects for a Dark Matter Annihilation Signal toward the Sagittarius Dwarf Galaxy with Ground-based Cherenkov telescopes
title_full Prospects for a Dark Matter Annihilation Signal toward the Sagittarius Dwarf Galaxy with Ground-based Cherenkov telescopes
title_fullStr Prospects for a Dark Matter Annihilation Signal toward the Sagittarius Dwarf Galaxy with Ground-based Cherenkov telescopes
title_full_unstemmed Prospects for a Dark Matter Annihilation Signal toward the Sagittarius Dwarf Galaxy with Ground-based Cherenkov telescopes
title_sort Prospects for a Dark Matter Annihilation Signal toward the Sagittarius Dwarf Galaxy with Ground-based Cherenkov telescopes
dc.creator.none.fl_str_mv Viana, A.
Medina, Maria Clementina
Peñarrubia, J.
Brun, P.
Glicenstein, J.F.
Kosack, K.
Moulin, E.
Naumann Godo, M.
Peyaud, B.
author Viana, A.
author_facet Viana, A.
Medina, Maria Clementina
Peñarrubia, J.
Brun, P.
Glicenstein, J.F.
Kosack, K.
Moulin, E.
Naumann Godo, M.
Peyaud, B.
author_role author
author2 Medina, Maria Clementina
Peñarrubia, J.
Brun, P.
Glicenstein, J.F.
Kosack, K.
Moulin, E.
Naumann Godo, M.
Peyaud, B.
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Gamma Rays
Dwarf Spheroidal Galaxy
Dark Matter
topic Gamma Rays
Dwarf Spheroidal Galaxy
Dark Matter
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Dwarf galaxies are widely believed to be among the best targets for indirect dark matter searches using high-energy gamma rays; and indeed gamma-ray emission from these objects has long been a subject of detailed study for ground- based atmospheric Cherenkov telescopes. Here, we update current exclusion limits obtained on the closest dwarf, the Sagittarius dwarf galaxy, in light of re- cent realistic dark matter halo models. The constraints on the velocity-weighted annihilation cross section of the dark matter particle are of a few 10−23 cm^3 s^{−1} in the TeV energy range for a 50 h exposure. The limits are extrapolated to the sensitivities of future Cherenkov Telescope Arrays. For 200 h of observation time, the sensitivity at 95% C.L. reaches 10−25 cm^3 s^{−1} . Possible astrophysical back- grounds from gamma-ray sources dissembled in Sagittarius dwarf are studied. It is shown that with long-enough observation times, gamma-ray background from millisecond pulsars in a globular cluster contained within Sagittarius dwarf may" "limit the sensitivity to dark matter annihilations.
Fil: Viana, A.. Institute of Research into the Fundamental Laws of the Universe; Francia
Fil: Medina, Maria Clementina. Institute of Research into the Fundamental Laws of the Universe; Francia. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomia; Argentina
Fil: Peñarrubia, J.. University of Cambridge; Reino Unido
Fil: Brun, P.. Institute of Research into the Fundamental Laws of the Universe; Francia
Fil: Glicenstein, J.F.. Institute of Research into the Fundamental Laws of the Universe; Francia
Fil: Kosack, K.. Institute of Research into the Fundamental Laws of the Universe; Francia
Fil: Moulin, E.. Institute of Research into the Fundamental Laws of the Universe; Francia
Fil: Naumann Godo, M.. Institute of Research into the Fundamental Laws of the Universe; Francia
Fil: Peyaud, B.. Institute of Research into the Fundamental Laws of the Universe; Francia
description Dwarf galaxies are widely believed to be among the best targets for indirect dark matter searches using high-energy gamma rays; and indeed gamma-ray emission from these objects has long been a subject of detailed study for ground- based atmospheric Cherenkov telescopes. Here, we update current exclusion limits obtained on the closest dwarf, the Sagittarius dwarf galaxy, in light of re- cent realistic dark matter halo models. The constraints on the velocity-weighted annihilation cross section of the dark matter particle are of a few 10−23 cm^3 s^{−1} in the TeV energy range for a 50 h exposure. The limits are extrapolated to the sensitivities of future Cherenkov Telescope Arrays. For 200 h of observation time, the sensitivity at 95% C.L. reaches 10−25 cm^3 s^{−1} . Possible astrophysical back- grounds from gamma-ray sources dissembled in Sagittarius dwarf are studied. It is shown that with long-enough observation times, gamma-ray background from millisecond pulsars in a globular cluster contained within Sagittarius dwarf may" "limit the sensitivity to dark matter annihilations.
publishDate 2012
dc.date.none.fl_str_mv 2012-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/17192
Viana, A.; Medina, Maria Clementina; Peñarrubia, J.; Brun, P.; Glicenstein, J.F.; et al.; Prospects for a Dark Matter Annihilation Signal toward the Sagittarius Dwarf Galaxy with Ground-based Cherenkov telescopes; Iop Publishing; Astrophysical Journal; 746; 2-2012; 77-90
0004-637X
url http://hdl.handle.net/11336/17192
identifier_str_mv Viana, A.; Medina, Maria Clementina; Peñarrubia, J.; Brun, P.; Glicenstein, J.F.; et al.; Prospects for a Dark Matter Annihilation Signal toward the Sagittarius Dwarf Galaxy with Ground-based Cherenkov telescopes; Iop Publishing; Astrophysical Journal; 746; 2-2012; 77-90
0004-637X
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1103.2627
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-637X/746/1/77/meta
info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/746/1/77
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Iop Publishing
publisher.none.fl_str_mv Iop Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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