Testing a Reported Correlation between Arrival Directions of Ultra-high-energy Cosmic Rays and a Flux Pattern from nearby Starburst Galaxies using Telescope Array Data

被引：47

作者：

Abbasi, R. U. ^{[1
,2
]}

Abe, M. ^{[3
]}

Abu-Zayyad, T. ^{[1
,2
]}

Allen, M. ^{[1
,2
]}

Azuma, R. ^{[4
]}

Barcikowski, E. ^{[1
,2
]}

Belz, J. W. ^{[1
,2
]}

Bergman, D. R. ^{[1
,2
]}

Blake, S. A. ^{[1
,2
]}

Cady, R. ^{[1
,2
]}

Cheon, B. G. ^{[5
,6
]}

Chiba, J. ^{[7
]}

Chikawa, M. ^{[8
]}

di Matteo, A. ^{[9
]}

Fujii, T. ^{[10
]}

Fujita, K. ^{[11
]}

Fukushima, M. ^{[10
,12
]}

Furlich, G. ^{[1
,2
]}

Goto, T. ^{[11
]}

Hanlon, W. ^{[1
,2
]}

Hayashi, M. ^{[13
]}

Hayashi, Y. ^{[11
]}

Hayashida, N. ^{[14
]}

Hibino, K. ^{[14
]}

Honda, K. ^{[15
]}

Ikeda, D. ^{[10
]}

Inoue, N. ^{[3
]}

Ishii, T. ^{[15
]}

Ishimori, R. ^{[4
]}

Ito, H. ^{[16
]}

Ivanov, D. ^{[1
,2
]}

Jeong, H. M. ^{[17
]}

Jeong, S. ^{[17
]}

Jui, C. C. H. ^{[1
,2
]}

Kadota, K. ^{[18
]}

Kakimoto, F. ^{[4
]}

Kalashev, O. ^{[19
]}

Kasahara, K. ^{[20
]}

Kawai, H. ^{[21
]}

Kawakami, S. ^{[11
]}

Kawana, S. ^{[3
]}

Kawata, K. ^{[10
]}

Kido, E. ^{[10
]}

Kim, H. B. ^{[5
,6
]}

Kim, J. H. ^{[1
,2
,22
]}

Kishigami, S. ^{[11
]}

Kitamura, S. ^{[4
]}

Kitamura, Y. ^{[4
]}

Kuzmin, V ^{[19
]}

Kuznetsov, M. ^{[19
]}

机构：

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

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

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

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

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

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

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

[8] Kindai Univ, Dept Phys, Higashiosaka, Osaka, Japan

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

[10] Univ Tokyo, Inst Cosm Ray Res, Chiba, Japan

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

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

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

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

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

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

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

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

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

[20] Waseda Univ, Adv Res Inst Sci & Engn, Shinjuku Ku, Tokyo, Japan

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

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

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

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

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

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

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

[28] Rutgers Univ State Univ New Jersey, Dept Phys & Astron, Piscataway, NJ USA

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

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

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

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

[33] Natl Inst Radiol Sci, Chiba, Chiba, Japan

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

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

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

[37] Ehime Univ, Dept Phys, Matsuyama, Ehime, Japan

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2018年 / 867卷 / 02期

基金：

美国国家科学基金会; 新加坡国家研究基金会; 日本学术振兴会;

关键词：

astroparticle physics; cosmic rays; galaxies: starburst; methods: data analysis; ANISOTROPY;

D O I：

10.3847/2041-8213/aaebf9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Pierre Auger Collaboration (Auger) recently reported a correlation between the arrival directions of cosmic rays with energies above 39 EeV and the flux pattern of 23 nearby starburst galaxies (SBGs). In this Letter, we tested the same hypothesis using cosmic rays detected by the Telescope Array experiment (TA) in the 9 yr period from 2008 May to 2017 May. Unlike the Auger analysis, we did not optimize the parameter values but kept them fixed to the best-fit values found by Auger, namely 9.7% for the anisotropic fraction of cosmic rays assumed to originate from the SBGs in the list and 12 degrees.9 for the angular scale of the correlations. The energy threshold that we adopted is 43 EeV, corresponding to 39 EeV in Auger when taking into account the energy-scale difference between two experiments. We find that the TA data is compatible with isotropy to within 1.1 sigma and with the Auger result to within 1.4 sigma, meaning that it is not capable to discriminate between these two hypotheses.

引用

页数：5

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