A search for dark matter in Triangulum II with the MAGIC telescopes

We present the first results from very-high-energy observations of the dwarf spheroidal satellite candidate Triangulum II with the MAGIC telescopes from 62.4 h of good-quality data taken between August 2016 and August 2017. We find no gamma-ray excess in the direction of Triangulum II, and upper lim...

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Detalles Bibliográficos
Autores: Barrio Uña, Juan Abel, Contreras González, José Luis, Fidalgo, David Friedrich Carreto, Fonseca González, María Victoria, Hoang, Kim Dinh, López Moya, Marcos, Peñil Del Campo, Pablo, Saha, Lab
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/6334
Acceso en línea:https://hdl.handle.net/20.500.14352/6334
Access Level:acceso abierto
Palabra clave:539.1
Gamma-ray signals
Galaxies
Clumpy
Annihilation
Masses
Limits
Decay
Física nuclear
2207 Física Atómica y Nuclear
id ES_e7cbc832ec50eb62fdc8d83dcee5695a
oai_identifier_str oai:docta.ucm.es:20.500.14352/6334
network_acronym_str ES
network_name_str España
repository_id_str
spelling A search for dark matter in Triangulum II with the MAGIC telescopesBarrio Uña, Juan AbelContreras González, José LuisFidalgo, David Friedrich CarretoFonseca González, María VictoriaHoang, Kim DinhLópez Moya, MarcosPeñil Del Campo, PabloSaha, Lab539.1Gamma-ray signalsGalaxiesClumpyAnnihilationMassesLimitsDecayFísica nuclear2207 Física Atómica y NuclearWe present the first results from very-high-energy observations of the dwarf spheroidal satellite candidate Triangulum II with the MAGIC telescopes from 62.4 h of good-quality data taken between August 2016 and August 2017. We find no gamma-ray excess in the direction of Triangulum II, and upper limits on both the differential and integral gamma-ray flux are presented. Currently, the kinematics of Triangulum II are affected by large uncertainties leading to a bias in the determination of the properties of its dark matter halo. Using a scaling relation between the annihilation J-factor and heliocentric distance of well-known dwarf spheroidal galaxies, we estimate an annihilation J-factor for Triangulum II for WIMP dark matter of log[J(ann)(0.5 degrees)/GeV2 cm(-5)] = 19.35 +/- 0.37. We also derive a dark matter density profile for the object relying on results from resolved simulations of Milky Way sized dark matter halos. We obtain 95% confidence-level limits on the thermally averaged annihilation cross section for WIMP annihilation into various Standard Model channels. The most stringent limits are obtained in the tau(-)tau(+) final state, where a cross section for annihilation down to <sigma(ann)nu > = 3.05 x 10(-24) cm(3) s(-1) is excluded. (C) 2020 Elsevier B.V. All rights reserved.Elsevier B.V.Universidad Complutense de Madrid20202020-05-0120202020-05-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/6334reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/63342026-06-02T12:44:21Z
dc.title.none.fl_str_mv A search for dark matter in Triangulum II with the MAGIC telescopes
title A search for dark matter in Triangulum II with the MAGIC telescopes
spellingShingle A search for dark matter in Triangulum II with the MAGIC telescopes
Barrio Uña, Juan Abel
539.1
Gamma-ray signals
Galaxies
Clumpy
Annihilation
Masses
Limits
Decay
Física nuclear
2207 Física Atómica y Nuclear
title_short A search for dark matter in Triangulum II with the MAGIC telescopes
title_full A search for dark matter in Triangulum II with the MAGIC telescopes
title_fullStr A search for dark matter in Triangulum II with the MAGIC telescopes
title_full_unstemmed A search for dark matter in Triangulum II with the MAGIC telescopes
title_sort A search for dark matter in Triangulum II with the MAGIC telescopes
dc.creator.none.fl_str_mv Barrio Uña, Juan Abel
Contreras González, José Luis
Fidalgo, David Friedrich Carreto
Fonseca González, María Victoria
Hoang, Kim Dinh
López Moya, Marcos
Peñil Del Campo, Pablo
Saha, Lab
author Barrio Uña, Juan Abel
author_facet Barrio Uña, Juan Abel
Contreras González, José Luis
Fidalgo, David Friedrich Carreto
Fonseca González, María Victoria
Hoang, Kim Dinh
López Moya, Marcos
Peñil Del Campo, Pablo
Saha, Lab
author_role author
author2 Contreras González, José Luis
Fidalgo, David Friedrich Carreto
Fonseca González, María Victoria
Hoang, Kim Dinh
López Moya, Marcos
Peñil Del Campo, Pablo
Saha, Lab
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 539.1
Gamma-ray signals
Galaxies
Clumpy
Annihilation
Masses
Limits
Decay
Física nuclear
2207 Física Atómica y Nuclear
topic 539.1
Gamma-ray signals
Galaxies
Clumpy
Annihilation
Masses
Limits
Decay
Física nuclear
2207 Física Atómica y Nuclear
description We present the first results from very-high-energy observations of the dwarf spheroidal satellite candidate Triangulum II with the MAGIC telescopes from 62.4 h of good-quality data taken between August 2016 and August 2017. We find no gamma-ray excess in the direction of Triangulum II, and upper limits on both the differential and integral gamma-ray flux are presented. Currently, the kinematics of Triangulum II are affected by large uncertainties leading to a bias in the determination of the properties of its dark matter halo. Using a scaling relation between the annihilation J-factor and heliocentric distance of well-known dwarf spheroidal galaxies, we estimate an annihilation J-factor for Triangulum II for WIMP dark matter of log[J(ann)(0.5 degrees)/GeV2 cm(-5)] = 19.35 +/- 0.37. We also derive a dark matter density profile for the object relying on results from resolved simulations of Milky Way sized dark matter halos. We obtain 95% confidence-level limits on the thermally averaged annihilation cross section for WIMP annihilation into various Standard Model channels. The most stringent limits are obtained in the tau(-)tau(+) final state, where a cross section for annihilation down to <sigma(ann)nu > = 3.05 x 10(-24) cm(3) s(-1) is excluded. (C) 2020 Elsevier B.V. All rights reserved.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-05-01
2020
2020-05-01
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/20.500.14352/6334
url https://hdl.handle.net/20.500.14352/6334
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 Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
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_ 1869422886017564672
score 15,301629

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