Evidence for a Supergalactic Structure of Magnetic Deflection Multiplets of Ultra-high-energy Cosmic Rays

被引：19

作者：

Abbasi, R. U. ^{[1
]}

Abe, M. ^{[2
]}

Abu-Zayyad, T. ^{[3
,4
]}

Allen, M. ^{[3
,4
]}

Azuma, R. ^{[5
]}

Barcikowski, E. ^{[3
,4
]}

Belz, J. W. ^{[3
,4
]}

Bergman, D. R. ^{[3
,4
]}

Blake, S. A. ^{[3
,4
]}

Cady, R. ^{[3
,4
]}

Cheon, B. G. ^{[6
,7
]}

Chiba, J. ^{[8
]}

Chikawa, M. ^{[9
]}

di Matteo, A. ^{[10
,41
]}

Fujii, T. ^{[11
,12
]}

Fujisue, K. ^{[9
]}

Fujita, K. ^{[13
]}

Fujiwara, R. ^{[13
]}

Fukushima, M. ^{[9
,14
]}

Furlich, G. ^{[3
,4
]}

Hanlon, W. ^{[3
,4
]}

Hayashi, M. ^{[15
]}

Hayashida, N. ^{[16
]}

Hibino, K. ^{[16
]}

Higuchi, R. ^{[9
]}

Honda, K. ^{[17
]}

Ikeda, D. ^{[18
]}

Inadomi, T. ^{[19
]}

Inoue, N. ^{[2
]}

Ishii, T. ^{[17
]}

Ishimori, R. ^{[5
]}

Ito, H. ^{[20
]}

Ivanov, D. ^{[3
,4
]}

Iwakura, H. ^{[19
]}

Jeong, H. M. ^{[21
]}

Jeong, S. ^{[21
]}

Jui, C. C. H. ^{[3
,4
]}

Kadota, K. ^{[22
]}

Kakimoto, F. ^{[16
]}

Kalashev, O. ^{[23
]}

Kasahara, K. ^{[24
]}

Kasami, S. ^{[25
]}

Kawai, H. ^{[26
]}

Kawakami, S. ^{[13
]}

Kawana, S. ^{[2
]}

Kawata, K. ^{[9
]}

Kido, E. ^{[9
]}

Kim, H. B. ^{[6
,7
]}

Kim, J. H. ^{[13
]}

Kim, M. H. ^{[21
]}

机构：

[1] Loyola Univ, Dept Phys, Chicago, IL 60611 USA

[2] Saitama Univ, Grad Sch Sci & Engn, Saitama, Saitama, Japan

[3] Univ Utah, High Energy Astrophys Inst, Salt Lake City, UT 84112 USA

[4] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA

[5] Tokyo Inst Technol, Grad Sch Sci & Engn, Meguro Ku, Tokyo, Japan

[6] Hanyang Univ, Dept Phys, Seoul, South Korea

[7] Hanyang Univ, Res Inst Nat Sci, Seoul, South Korea

[8] Tokyo Univ Sci, Dept Phys, Noda, Chiba, Japan

[9] Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba, Japan

[10] Univ Libre Bruxelles, Serv Phys Theor, Brussels, Belgium

[11] Kyoto Univ, Hakubi Ctr Adv Res, Sakyo Ku, Kitashirakawa Oiwakecho, Kyoto, Japan

[12] Kyoto Univ, Grad Sch Sci, Sakyo Ku, Kitashirakawa Oiwakecho, Kyoto, Japan

[13] Osaka City Univ, Grad Sch Sci, Osaka, Osaka, Japan

[14] Univ Tokyo, Kavli Inst Phys & Math Universe WPI, Todai Inst Adv Study, Kashiwa, Chiba, Japan

[15] Shinshu Univ, Informat Engn Grad Sch Sci & Technol, Nagano, Nagano, Japan

[16] Kanagawa Univ, Fac Engn, Yokohama, Kanagawa, Japan

[17] Univ Yamanashi, Interdisciplinary Grad Sch Med & Engn, Kofu, Yamanashi, Japan

[18] Univ Tokyo, Earthquake Res Inst, Bunkyo Ku, Tokyo, Japan

[19] Shinshu Univ, Acad Assembly Sch Sci & Technol, Inst Engn, Nagano, Nagano, Japan

[20] RIKEN, Astrophys Big Bang Lab, Wako, Saitama, Japan

[21] Sungkyunkwan Univ, Dept Phys, Suwon, South Korea

[22] Tokyo City Univ, Dept Phys, Setagaya Ku, Tokyo, Japan

[23] Russian Acad Sci, Inst Nucl Res, Moscow, Russia

[24] Shibaura Inst Technol, Fac Syst Engn & Sci, Minato Ku, Tokyo, Japan

[25] Osaka Electrocommun Univ, Fac Engn, Dept Engn Sci, Neyagawa, Osaka, Japan

[26] Chiba Univ, Dept Phys, Chiba, Chiba, Japan

[27] Yonsei Univ, Dept Phys, Seoul, South Korea

[28] Univ Nova Gorica, Ctr Astrophys & Cosmol, Ajdovscina, Slovenia

[29] Kochi Univ, Fac Sci, Kochi, Kochi, Japan

[30] Osaka City Univ, Nambu Yoichiro Inst Theoret & Expt Phys, Osaka, Osaka, Japan

[31] Ritsumeikan Univ, Dept Phys Sci, Kusatsu, Shiga, Japan

[32] Natl Inst Informat & Commun Technol, Quantum ICT Adv Dev Ctr, Koganei, Tokyo, Japan

[33] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow, Russia

[34] Ulsan Natl Inst Sci & Technol, Sch Nat Sci, Dept Phys, UNIST Gil, Ulsan, South Korea

[35] Hiroshima City Univ, Grad Sch Informat Sci, Hiroshima, Hiroshima, Japan

[36] KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki, Japan

[37] Natl Inst Quantum & Radiol Sci & Technol, Dept Res Planning & Promot, Quantum Med Sci Directorate, Chiba, Chiba, Japan

[38] Czech Acad Sci, Inst Phys, CEICO, Prague, Czech Republic

[39] Ewha Womans Univ, Dept Phys, Seoul, South Korea

[40] Ewha Womans Univ, Inst Early Universe, Seoul, South Korea

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

来源：

ASTROPHYSICAL JOURNAL | 2020年 / 899卷 / 01期

基金：

日本学术振兴会; 新加坡国家研究基金会; 美国国家科学基金会;

关键词：

Extragalactic magnetic fields; Ultra-high-energy cosmic radiation; Cosmic rays; High energy astrophysics; Astrophysical magnetism; Cosmic ray astronomy; Cosmic ray sources;

D O I：

10.3847/1538-4357/aba26c

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Evidence for a large-scale supergalactic cosmic-ray multiplet (arrival directions correlated with energy) structure is reported for ultra-high-energy cosmic-ray (UHECR) energies above 10(19) eV using 7 years of data from the Telescope Array (TA) surface detector and updated to 10 years. Previous energy-position correlation studies have made assumptions regarding magnetic field shapes and strength, and UHECR composition. Here the assumption tested is that, because the supergalactic plane is a fit to the average matter density of the local large-scale structure, UHECR sources and intervening extragalactic magnetic fields are correlated with this plane. This supergalactic deflection hypothesis is tested by the entire field-of-view (FOV) behavior of the strength of intermediate-scale energy-angle correlations. These multiplets are measured in spherical cap section bins (wedges) of the FOV to account for coherent and random magnetic fields. The structure found is consistent with supergalactic deflection, the previously published energy spectrum anisotropy results of the TA (the Hotspot and Coldspot), and toy-model simulations of a supergalactic magnetic sheet. The seven year data posttrial significance of this supergalactic structure of multiplets appearing by chance, on an isotropic sky, is found by Monte Carlo simulation to be 4.2 sigma. The 10 years of data posttrial significance is 4.1 sigma. Furthermore, the starburst galaxy M82 is shown to be a possible source of the TA Hotspot, and an estimate of the supergalactic magnetic field using UHECR measurements is presented.

引用

页数：13

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