Large-scale Cosmic-ray Anisotropies with 19 yr of Data from the Pierre Auger Observatory

被引：1

作者：

Halim, A. Abdul ^{[1
]}

Abreu, P. ^{[2
,3
]}

Aglietta, M. ^{[4
,5
]}

Allekotte, I ^{[6
,7
]}

Cheminant, K. Almeida ^{[8
,9
]}

Almela, A. ^{[10
,11
]}

Aloisio, R. ^{[12
,13
]}

Alvarez-Muniz, J. ^{[14
]}

Ambrosone, A. ^{[12
]}

Ammerman Yebra, J. ^{[14
]}

Anastasi, G. A. ^{[15
,16
]}

Anchordoqui, L. ^{[17
]}

Andrada, B. ^{[10
]}

Dourado, L. Andrade ^{[12
,13
]}

Andringa, S. ^{[2
,3
]}

Apollonio, L. ^{[18
,19
]}

Aramo, C. ^{[20
]}

Ferreira, P. R. Araujo ^{[21
]}

Arnone, E. ^{[5
,22
]}

Arteaga Velazquez, J. C. ^{[23
]}

Assis, P. ^{[2
,3
]}

Avila, G. ^{[24
,25
]}

Avocone, E. ^{[13
,26
]}

Bakalova, A. ^{[27
]}

Barbato, F. ^{[12
,13
]}

Mocellin, A. Bartz ^{[28
]}

Bellido, J. A. ^{[1
]}

Berat, C. ^{[29
]}

Bertaina, M. E. ^{[5
,22
]}

Bhatta, G. ^{[30
]}

Bianciotto, M. ^{[5
,22
]}

Biermann, P. L. ^{[31
,32
,33
,96
]}

Binet, V ^{[34
,35
]}

Bismark, K. ^{[10
,36
]}

Bister, T. ^{[8
,9
]}

Biteau, J. ^{[37
,104
]}

Blazek, J. ^{[27
]}

Bleve, C. ^{[29
]}

Bluemer, J. ^{[38
]}

Bohacova, M. ^{[6
,7
]}

Boncioli, D. ^{[13
,26
]}

Bonifazi, C. ^{[31
,32
,33
]}

Arbeletche, L. Bonneau ^{[39
]}

Borodai, N. ^{[30
]}

Brack, J. ^{[6
,7
,101
]}

Brichetto Orchera, P. G. ^{[10
]}

Briechle, F. L. ^{[21
]}

Bueno, A. ^{[40
,41
]}

Buitink, S. ^{[42
]}

Buscemi, M. ^{[15
,16
]}

机构：

[1] Univ Adelaide, Adelaide, SA, Australia

[2] Univ Lisboa UL, Lab Instrumentacao & Fis Expt Particular LIP, Lisbon, Portugal

[3] Univ Lisboa UL, Inst Super Tecn IST, Lisbon, Portugal

[4] Osservatorio Astrofis Torino INAF, Turin, Italy

[5] Ist Nazl Fis Nucl, Sez Torino, Turin, Italy

[6] Ctr Mico Bariloche, San Carlos De Bariloche, Rio Negro, Argentina

[7] Inst Balseiro CNEA UNCuyo CONICET, San Carlos De Bariloche, Rio Negro, Argentina

[8] Natl Inst Kernfys Hoge Energie Fys NIKHEF, Sci Pk, Amsterdam, Netherlands

[9] Radboud Univ Nijmegen, IMAPP, Nijmegen, Netherlands

[10] UNSAM, Inst Tecnol Detecc & Astroparticulas CNEA, CONICET, Buenos Aires, DF, Argentina

[11] Univ Tecnol Nacl, Fac Reg Buenos Aires, Buenos Aires, DF, Argentina

[12] Gran Sasso Sci Inst, Laquila, Italy

[13] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, Laquila, Italy

[14] Univ Santiago de Compostela, Inst Galego Fis Altas Enerxias IGFAE, Santiago De Compostela, Spain

[15] Univ Catania, Dipartimento Fis & Astron Ettore Majorana, Catania, Italy

[16] Ist Nazl Fis Nucl, Sez Catania, Catania, Italy

[17] CUNY, Dept Phys & Astron, Lehman Coll, Bronx, NY 10468 USA

[18] Dipartimento Fis, Univ Milano, Milan, Italy

[19] Ist Nazl Fis Nucl, Sez Milano, Milan, Italy

[20] Ist Nazl Fis Nucl, Sez Napoli, Naples, Italy

[21] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany

[22] Univ Torino, Dipartimento Fis, Turin, Italy

[23] Univ Michoacana, Morelia, Michoacan, Mexico

[24] Observ Pierre Auger, Malargue, Argentina

[25] Comis Nacl Energia Atom, Malargue, Argentina

[26] Univ Aquila, Dipartimento Sci Fis & Chim, Laquila, Italy

[27] Czech Acad Sci, Inst Phys, Prague, Czech Republic

[28] Colorado Sch Mines, Golden, CO 80401 USA

[29] Univ Grenoble Alpes, Grenoble Inst Engn, CNRS, LPSC IN2P3, F-38000 Grenoble, France

[30] Inst Nucl Phys PAN, Krakow, Poland

[31] Int Ctr Adv Studies, Campus Miguelete San Martin, Buenos Aires, DF, Argentina

[32] ECyT UNSAM, Inst Ciencias Sicas, Campus Miguelete San Martin, Buenos Aires, DF, Argentina

[33] Consejo Nacl Invest Cient & Tecn, Campus Miguelete San Martin, Buenos Aires, DF, Argentina

[34] UNR, CONICET, Inst Fis Rosario IFIR, Rosario, Santa Fe, Argentina

[35] UNR, Fac Ciencias Bioquim & Farmaceut, Rosario, Santa Fe, Argentina

[36] Karlsruhe Inst Technol KIT, Inst Expt Particle Phys, Karlsruhe, Germany

[37] Univ Paris Saclay, IJCLab, CNRS IN2P3, Orsay, France

[38] Karlsruhe Inst Technol KIT, Inst Astroparticle Phys, Karlsruhe, Germany

[39] Univ Estadual Campinas, IFGW, UNICAMP, Campinas, SP, Brazil

[40] Univ Granada, Granada, Spain

[41] CAFPE, Granada, Spain

[42] Vrije Univ Brussels, Brussels, Belgium

[43] Univ Autonoma Chiapas, Tuxtla Gutierrez, Chiapas, Mexico

[44] UNSAM, Inst Tecnol Detecc & Astroparticulas, CONICET, CNEA, Mendoza, Argentina

[45] Univ Tecnol Nacl, CONICET CNEA, Fac Reg Mendoza, Mendoza, Argentina

[46] Univ Sao Paulo, Escola Engn Lorena, Lorena, SP, Brazil

[47] Ist Nazl Fis Nucl, Sez Lecce, Lecce, Italy

[48] Palacky Univ, Olomouc, Czech Republic

[49] Univ Napoli Federico II, Dipartimento Fis Ettore Pancini, Naples, Italy

[50] Politecn Milan, Dipartimento Sci & Tecnol Aerosp, Milan, Italy

来源：

ASTROPHYSICAL JOURNAL | 2024年 / 976卷 / 01期

基金：

巴西圣保罗研究基金会; 美国国家科学基金会; 澳大利亚研究理事会;

关键词：

SPECTRUM;

D O I：

10.3847/1538-4357/ad843b

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Results are presented for the measurement of large-scale anisotropies in the arrival directions of ultra-high-energy cosmic rays detected at the Pierre Auger Observatory during 19 yr of operation, prior to AugerPrime, the upgrade of the observatory. The 3D dipole amplitude and direction are reconstructed above 4 EeV in four energy bins. Besides the established dipolar anisotropy in R.A. above 8 EeV, the Fourier amplitude of the 8-16 EeV energy bin is now also above the 5s discovery level. No time variation of the dipole moment above 8 EeV is found, setting an upper limit to the rate of change of such variations of 0.3% yr(-1) at the 95% confidence level. Additionally, the results for the angular power spectrum are shown, demonstrating no other statistically significant multipoles. The results for the equatorial dipole component down to 0.03 EeV are presented, using for the first time a data set obtained with a trigger that has been optimized for lower energies. Finally, model predictions are discussed and compared with observations, based on two source emission scenarios obtained in the combined fit of spectrum and composition above 0.6 EeV.

引用

页数：13

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