Upper Limits on the VHE Gamma-Ray Emission from the Willman 1 Satellite Galaxy with the Magic Telescope

We present the result of the observation of the ultrafaint dwarf galaxy Willman 1 performed with the 17 m MAGIC telescope during 15.5 hr between March and May 2008. No significant γ-ray emission was found. We derived upper limits of the order of 10-12 ph cm-2 s-1 on the integral flux above 100 GeV,...

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Detalles Bibliográficos
Autores: Paredes i Poy, Josep Maria, Ribó Gomis, Marc, Bosch i Ramon, Valentí, Moldón Vara, Francisco Javier, Zabalza de Torres, Víctor, Bordas Coma, Pol, MAGIC Collaboration
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2009
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/150834
Acceso en línea:https://hdl.handle.net/2445/150834
Access Level:acceso abierto
Palabra clave:Matèria fosca (Astronomia)
Raigs gamma
Galàxies
Dark matter (Astronomy)
Gamma rays
Galaxies
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spelling Upper Limits on the VHE Gamma-Ray Emission from the Willman 1 Satellite Galaxy with the Magic TelescopeParedes i Poy, Josep MariaRibó Gomis, MarcBosch i Ramon, ValentíMoldón Vara, Francisco JavierZabalza de Torres, VíctorBordas Coma, PolMAGIC CollaborationMatèria fosca (Astronomia)Raigs gammaGalàxiesDark matter (Astronomy)Gamma raysGalaxiesWe present the result of the observation of the ultrafaint dwarf galaxy Willman 1 performed with the 17 m MAGIC telescope during 15.5 hr between March and May 2008. No significant γ-ray emission was found. We derived upper limits of the order of 10-12 ph cm-2 s-1 on the integral flux above 100 GeV, which we compare with predictions from several of the established neutralino benchmark models in the mSUGRA parameter space. The neutralino annihilation spectra are defined after including the recently quantified contribution of internal bremsstrahlung from the virtual sparticles that mediate the annihilation. Flux boost factors of three orders of magnitude are required even in the most optimistic scenario to match our upper limits. However, uncertainties in the dark matter intrinsic and extrinsic properties (e.g., presence of substructures, Sommerfeld effect) may significantly reduce this gap.Institute of Physics (IOP)2020202020092020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion6 p.application/pdfhttps://hdl.handle.net/2445/150834Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1088/0004-637X/697/2/1299Astrophysical Journal, 2009, vol. 697, num. 2, p. 1299-1304https://doi.org/10.1088/0004-637X/697/2/1299(c) American Astronomical Society, 2009info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1508342026-05-29T05:05:01Z
dc.title.none.fl_str_mv Upper Limits on the VHE Gamma-Ray Emission from the Willman 1 Satellite Galaxy with the Magic Telescope
title Upper Limits on the VHE Gamma-Ray Emission from the Willman 1 Satellite Galaxy with the Magic Telescope
spellingShingle Upper Limits on the VHE Gamma-Ray Emission from the Willman 1 Satellite Galaxy with the Magic Telescope
Paredes i Poy, Josep Maria
Matèria fosca (Astronomia)
Raigs gamma
Galàxies
Dark matter (Astronomy)
Gamma rays
Galaxies
title_short Upper Limits on the VHE Gamma-Ray Emission from the Willman 1 Satellite Galaxy with the Magic Telescope
title_full Upper Limits on the VHE Gamma-Ray Emission from the Willman 1 Satellite Galaxy with the Magic Telescope
title_fullStr Upper Limits on the VHE Gamma-Ray Emission from the Willman 1 Satellite Galaxy with the Magic Telescope
title_full_unstemmed Upper Limits on the VHE Gamma-Ray Emission from the Willman 1 Satellite Galaxy with the Magic Telescope
title_sort Upper Limits on the VHE Gamma-Ray Emission from the Willman 1 Satellite Galaxy with the Magic Telescope
dc.creator.none.fl_str_mv Paredes i Poy, Josep Maria
Ribó Gomis, Marc
Bosch i Ramon, Valentí
Moldón Vara, Francisco Javier
Zabalza de Torres, Víctor
Bordas Coma, Pol
MAGIC Collaboration
author Paredes i Poy, Josep Maria
author_facet Paredes i Poy, Josep Maria
Ribó Gomis, Marc
Bosch i Ramon, Valentí
Moldón Vara, Francisco Javier
Zabalza de Torres, Víctor
Bordas Coma, Pol
MAGIC Collaboration
author_role author
author2 Ribó Gomis, Marc
Bosch i Ramon, Valentí
Moldón Vara, Francisco Javier
Zabalza de Torres, Víctor
Bordas Coma, Pol
MAGIC Collaboration
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Matèria fosca (Astronomia)
Raigs gamma
Galàxies
Dark matter (Astronomy)
Gamma rays
Galaxies
topic Matèria fosca (Astronomia)
Raigs gamma
Galàxies
Dark matter (Astronomy)
Gamma rays
Galaxies
description We present the result of the observation of the ultrafaint dwarf galaxy Willman 1 performed with the 17 m MAGIC telescope during 15.5 hr between March and May 2008. No significant γ-ray emission was found. We derived upper limits of the order of 10-12 ph cm-2 s-1 on the integral flux above 100 GeV, which we compare with predictions from several of the established neutralino benchmark models in the mSUGRA parameter space. The neutralino annihilation spectra are defined after including the recently quantified contribution of internal bremsstrahlung from the virtual sparticles that mediate the annihilation. Flux boost factors of three orders of magnitude are required even in the most optimistic scenario to match our upper limits. However, uncertainties in the dark matter intrinsic and extrinsic properties (e.g., presence of substructures, Sommerfeld effect) may significantly reduce this gap.
publishDate 2009
dc.date.none.fl_str_mv 2009
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/150834
url https://hdl.handle.net/2445/150834
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1088/0004-637X/697/2/1299
Astrophysical Journal, 2009, vol. 697, num. 2, p. 1299-1304
https://doi.org/10.1088/0004-637X/697/2/1299
dc.rights.none.fl_str_mv (c) American Astronomical Society, 2009
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Astronomical Society, 2009
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 6 p.
application/pdf
dc.publisher.none.fl_str_mv Institute of Physics (IOP)
publisher.none.fl_str_mv Institute of Physics (IOP)
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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