RT Journal Article
T1 Combined searches for dark matter in dwarf spheroidal galaxies observed with the MAGIC telescopes, including new data from Coma Berenices and Draco
A1 Barrio Uña, Juan Abel
A1 Contreras González, José Luis
A1 Fonseca González, Mª Victoria
A1 López Moya, Marcos
A1 Miener, Tjark
A1 Morcuende, D.
A1 Peñil del Campo, Pablo
A1 Saha, Lab
A1 otros, ...
AB Milky Way dwarf spheroidal galaxies (dSphs) are among the best candidates to search for signals of dark matter annihilation with Imaging Atmospheric Cherenkov Telescopes, given their high mass-to-light ratios and the fact that they are free of astrophysical gamma-ray emitting sources. Since 2011, MAGIC has performed a multi-year observation program in search for Weakly Interacting Massive Particles (WIMPs) in dSphs. Results on the observations of Segue 1 and Ursa Major II dSphs have already been published and include some of the most stringent upper limits (ULs) on the velocity-averaged cross-section <sigma(ann) v > of WIMP annihilation from observations of dSphs. In this work, we report on the analyses of 52.1 h of data of Draco dSph and 49.5 h of Coma Berenices dSph observed with the MAGIC telescopes in 2018 and in 2019 respectively. No hint of a signal has been detected from either of these targets and new constraints on the <sigma(ann) v > of WIMP candidates have been derived. In order to improve the sensitivity of the search and reduce the effect of the systematic uncertainties due to the J-factor estimates, we have combined the data of all dSphs observed with the MAGIC telescopes. Using 354.3 h of dSphs good quality data, 95% CL ULs on <sigma(ann) v > have been obtained for 9 annihilation channels. For most of the channels, these results reach values of the order of 10(-24) cm(3)/s at( )similar to TeV and are the most stringent limits obtained with the MAGIC telescopes so far. (C) 2021 Elsevier B.V. All rights reserved.
PB Elsevier B.V.
SN 2212-6864
YR 2022
FD 2022-03
LK https://hdl.handle.net/20.500.14352/71445
UL https://hdl.handle.net/20.500.14352/71445
LA eng
NO Artículo firmado por 193 autores. We would like to thank the Instituto de Astrofísica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The financial support of the German BMBF, MPG and HGF; the Italian INFN and INAF; the Swiss National Fund SNF; the ERDF under the Spanish Ministerio de Ciencia e Innovación (MICINN) (PID2019-104114RBC31, PID2019-104114RB-C32, PID2019-104114RB-C33, PID2019105510GB-C31, PID2019-107847RB-C41, PID2019-107847RB-C42, PID2019-107988GB-C22); the Indian Department of Atomic Energy; the Japanese ICRR, the University of Tokyo, JSPS, and MEXT; the Bulgarian Ministry of Education and Science, National RI Roadmap Project DO1-400/18.12.2020 and the Academy of Finland grant nr. 320045 is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia ``Severo Ochoa'' (SEV-2016-0588, CEX2019-000920-S), the Unidad de Excelencia ``María de Maeztu'' (CEX2019-000918-M, MDM-20150509-18-2) and by the CERCA program of the Generalitat de Catalunya; by the Croatian Science Foundation (HrZZ) Project IP2016-06-9782 and the University of Rijeka Project 13.12.1.3.02; by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3; the Polish National Research Centre grant UMO2016/22/M/ST9/00382; and by the Brazilian MCTIC, CNPq and FAPERJ. This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No. 754510.
NO Union Europea. Horizonte 2020
NO Ministerio de Ciencia e Innovación (MICINN)/FEDER
NO Centro de Excelencia Severo Ochoa
NO Unidad de Excelencia María de Maeztu
NO German BMBF Federal Ministry of Education & Research (BMBF)
NO MPG Max Planck Society
NO HGF
NO Italian INFN Istituto Nazionale di Fisica Nucleare (INFN)
NO INAF Istituto Nazionale Astrofisica (INAF)
NO Swiss National Fund SNF Swiss National Science Foundation (SNSF)
NO Indian Department of Atomic Energy
NO Japanese ICRR
NO University of Tokyo
NO JSPS Ministry of Education, Culture, Sports, Science and Technology, Japan
NO MEXT Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)
NO Bulgarian Ministry of Education and Science
NO National RI Roadmap Project
NO Academy of Finland Academy of Finland
NO CERCA program of the Generalitat de Catalunya
NO Croatian Science Foundation (HrZZ) Project
NO University of Rijeka
NO DFG Collaborative Research Center
NO Polish National Research Centre
NO Brazilian MCTIC
NO CNPq Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)
NO FAPERJ Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio De Janeiro (FAPERJ)
DS Docta Complutense
RD 30 abr 2024