期刊
ASTROPHYSICAL JOURNAL
卷 935, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/1538-4357/ac7d4e
关键词
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资金
- Argentina-Comision Nacional de Energia Atomica
- Agencia Nacional de Promocion Cientifica y Tecnologica (ANPCyT)
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET)
- Sao Paulo Research Foundation (FAPESP) [2019/10151-2, 2010/07359-6, 1999/05404-3]
- MSMT CR [LTT18004, LM2015038, LM2018102, CZ.02.1.01/0.0/0.0/16_013/0001402, CZ.02.1.01/0.0/0.0/18_046/0016010, CZ.02.1.01/0.0/0.0/17_049/0008422]
- Institut Lagrange de Paris (ILP) within the Investissements d'Avenir Programme [LABEX ANR-10-LABX-63, ANR-11-IDEX-0004-02]
- Mexico-Consejo Nacional de Ciencia y Tecnologia (CONACYT) [167733]
- Netherlands Organisation for Scientific Research (NWO) [DIR/WK/2018/11]
- National Science Centre [2016/22/M/ST9/00198, 2016/23/B/ST9/01635, 2020/39/B/ST9/01398]
- Romania-Ministry of Research, Innovation and Digitization, CNCS/CCCDIUEFISCDI within PNCDI III [PN19150201/16N/2019, PN1906010, TE128, PED289]
- Slovenia-Slovenian Research Agency [P1-0031, P1-0385, I0-0033, N1-0111]
- Spain-Ministerio de Economia, Industria y Competitividad [FPA2017-85114-P, PID2019-104676GB-C32]
- Xunta de Galicia [ED431C 2017/07]
- Junta de Andalucia Feder Funds [SOMM17/6104/UGR, P18-FR-4314]
- RENATA Red Nacional Tematica de Astroparticulas [FPA2015-68783-REDT]
- Maria de Maeztu Unit of Excellence [MDM-2016-0692]
- USA -Department of Energy [DE-AC02-07CH11359, DE-FR02-04ER41300, DE-FG02-99ER41107, DE-SC0011689]
- National Science Foundation [0450696]
- Gobierno de la Provincia de Mendoza
- Municipalidad de Malargue
- NDM Holdings and Valle Las Lenas
- Australia-the Australian Research Council
- Belgium -Fonds de la Recherche Scientifique (FNRS)
- Research Foundation Flanders (FWO)
- Brazil-Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Financiadora de Estudos e Projetos (FINEP)
- Fundacao de Amparo a Pesquisa do Estado de Rio de Janeiro (FAPERJ)
- Ministerio da Ciencia, Tecnologia, Inovacoes e Comunicacoes (MCTIC)
- France-Centre de Calcul IN2P3/CNRS
- Centre National de la Recherche Scientifique (CNRS)
- Departement Sciences de l'Univers (SDU-INSU/CNRS)
- Germany-Bundesministerium fur Bildung und Forschung (BMBF)
- Deutsche Forschungsgemeinschaft (DFG)
- Finanzministerium Baden-Wurttemberg
- Helmholtz Alliance for Astroparticle Physics (HAP)
- Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF)
- Ministerium fur Innovation, Wissenschaft und Forschung des Landes Nordrhein-Westfalen
- Ministerium fur Wissenschaft, Forschung und Kunst des Landes Baden-Wurttemberg
- Italy-Istituto Nazionale di Fisica Nucleare (INFN)
- Istituto Nazionale di Astrofisica (INAF)
- Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR)
- CETEMPS Center of Excellence
- Ministero degli Affari Esteri (MAE)
- Universidad Nacional Autonoma de Mexico (UNAM)
- PAPIIT DGAPAUNAM
- Netherlands-Ministry of Education, Culture and Science
- Netherlands Organisation for Scientific Research (NWO)
- SURF Cooperative
- PortugalPortuguese national funds
- FEDER funds within Programa Operacional Factores de Competitividade through Fundacao para a Ciencia e a Tecnologia (COMPETE)
- The Grainger Foundation
- Marie Curie-IRSES/EPLANET
- European Particle Physics Latin American Network
- UNESCO
This study investigates the angular correlations between ultra-high-energy cosmic rays and their sources, finding evidence of deviations from isotropy at energies above 40 EeV, providing important clues for understanding the relationship between cosmic rays and their sources.
A promising energy range to look for angular correlations between cosmic rays of extragalactic origin and their sources is at the highest energies, above a few tens of EeV (1 EeV equivalent to 10(18) eV). Despite the flux of these particles being extremely low, the area of similar to 3000 km(2) covered at the Pierre Auger Observatory, and the 17 yr data-taking period of the Phase 1 of its operations, have enabled us to measure the arrival directions of more than 2600 ultra-high-energy cosmic rays above 32 EeV. We publish this data set, the largest available at such energies from an integrated exposure of 122,000 km(2) sr yr, and search it for anisotropies over the 3.4 pi steradians covered with the Observatory. Evidence for a deviation in excess of isotropy at intermediate angular scales, with similar to 15 degrees Gaussian spread or similar to 25 degrees top-hat radius, is obtained at the 4 sigma significance level for cosmic-ray energies above similar to 40 EeV.
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