Effects of Galactic magnetic field on the UHECR anisotropy studies

Higuchi, R.; Sako, T.; Kawata, K.; Fujii, T.; Kido, E.; Abbasi, R.U.; Abu-Zayyad, T.; Allen, M.; Arai, Y.; Arimura, R.; Barcikowski, E.; Belz, J.W.; Bergman, D.R.; Blake, S.A.; Buckland, I.; Cady, R.; Cheon, B.G.; Chiba, J.; Chikawa, M.; Fujisue, K.; Fujita, K.; Fujiwara, R.; Fukushima, M.; Fukushima, R.; Furlich, G.; Gonzalez, R.; Hanlon, W.; Hayashi, M.; Hayashida, N.; Hibino, K.; Higuchi, R.; Honda, K.; Ikeda, D.; Inadomi, T.; Inoue, N.; Ishii, T.; Ito, H.; Ivanov, D.; Iwakura, H.; Iwasaki, A.; Jeong, H.M.; Jeong, S.; Jui, C.C.H.; Kadota, K.; Kakimoto, F.; Kalashev, O.; Kasahara, K.; Kasami, S.; Kawai, H.; Kawakami, S.; Kawana, S.; Kawata, K.; Kharuk, I.; Kido, E.; Kim, H.B.; Kim, J.H.; Kim, J.H.; Kim, M.H.; Kim, S.W.; Kimura, Y.; Kishigami, S.; Kubota, Y.; Kurisu, S.; Kuzmin, V.; Kuznetsov, M.; Kwon, Y.J.; Lee, K.H.; Lubsandorzhiev, B.; Lundquist, J.P.; Machida, K.; Matsumiya, H.; Matsuyama, T.; Matthews, J.N.; Mayta, R.; Minamino, M.; Mukai, K.; Myers, I.; Nagataki, S.; Nakai, K.; Nakamura, R.; Nakamura, T.; Nakamura, T.; Nakamura, Y.; Nakazawa, A.; Nishio, E.; Nonaka, T.; Oda, H.; Ogio, S.; Ohnishi, M.; Ohoka, H.; Oku, Y.; Okuda, T.; Omura, Y.; Ono, M.; Onogi, R.; Oshima, A.; Ozawa, S.; Park, I.H.; Potts, M.; Pshirkov, M.S.; Remington, J.; Rodriguez, D.C.; Rubtsov, G.I.; Ryu, D.; Sagawa, H.; Sahara, R.; Saito, Y.; Sakaki, N.; Sako, T.; Sakurai, N.; Sano, K.; Sato, K.; Seki, T.; Sekino, K.; Shah, P.D.; Shibasaki, Y.; Shibata, F.; Shibata, N.; Shibata, T.; Shimodaira, H.; Shin, B.K.; Shin, H.S.; Shinto, D.; Smith, J.D.; Sokolsky, P.; Sone, N.; Stokes, B.T.; Stroman, T.A.; Takagi, Y.; Takahashi, Y.; Takamura, M.; Takeda, M.; Takeishi, R.; Taketa, A.; Takita, M.; Tameda, Y.; Tanaka, H.; Tanaka, K.; Tanaka, M.; Tanoue, Y.; Thomas, S.B.; Thomson, G.B.; Tinyakov, P.; Tkachev, I.; Tokuno, H.; Tomida, T.; Troitsky, S.; Tsuda, R.; Tsunesada, Y.; Uchihori, Y.; Udo, S.; Uehama, T.; Urban, F.; Wong, T.; Yada, K.; Yamamoto, M.; Yamazaki, K.; Yang, J.; Yashiro, K.; Yoshida, F.; Yoshioka, Y.; Zhezher, Y.; Zundel, Z.

doi:10.22323/1.395.0358

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Effects of Galactic magnetic field on the UHECR anisotropy studies

Higuchi, R.;
Sako, T.;
Kawata, K.;
Fujii, T.;
Kido, E.;
... Cheon, B.G.;
외 157명

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초록

Telescope Array (TA) and Auger experiments reported anisotropies in the arrival direction of ultrahigh-energy cosmic rays (UHECRs). In particular, Auger Collaboration reported a correlation between UHECR events and the flux model of assumed sources and suggested a contribution of starburst galaxies (SBGs) to the anisotropy of UHECRs. However, in their study, the effect of coherent deflections by the galactic magnetic field (GMF) is not taken into account. In this study, we investigated the effect of the GMF on the arrival directions of UHECRs using the cosmic ray propagation code CRPropa3. We used a backtracking technique which consists of propagating antiparticles to map the flux outside the galaxy to at the earth. We estimate the systematic effects caused by GMF in the reported likelihood analysis. We conduct likelihood analysis for mock UHECR datasets based on the flux pattern through the GMF model. We found systematic decrease of (fani, θ) due to GMF. As prospects for the TAx4 experiment and joint analysis of Auger and TA collaborations, we develop the likelihood analysis method with the convolution of the rigidity spectrum.

키워드

Augers; Cosmic rays; Cosmology; Galaxies; Magnetic field effects; Anisotropy; Cosmic ray anisotropy; Cosmic ray propagation; Flux modeling; Flux patterns; Galactic magnetic fields; Likelihood analysis; Starburst galaxies; Systematic effects; Telescope arrays; Ultra high-energy cosmic rays

제목: Effects of Galactic magnetic field on the UHECR anisotropy studies

저자: Higuchi, R.; Sako, T.; Kawata, K.; Fujii, T.; Kido, E.; Abbasi, R.U.; Abu-Zayyad, T.; Allen, M.; Arai, Y.; Arimura, R.; Barcikowski, E.; Belz, J.W.; Bergman, D.R.; Blake, S.A.; Buckland, I.; Cady, R.; Cheon, B.G.; Chiba, J.; Chikawa, M.; Fujisue, K.; Fujita, K.; Fujiwara, R.; Fukushima, M.; Fukushima, R.; Furlich, G.; Gonzalez, R.; Hanlon, W.; Hayashi, M.; Hayashida, N.; Hibino, K.; Higuchi, R.; Honda, K.; Ikeda, D.; Inadomi, T.; Inoue, N.; Ishii, T.; Ito, H.; Ivanov, D.; Iwakura, H.; Iwasaki, A.; Jeong, H.M.; Jeong, S.; Jui, C.C.H.; Kadota, K.; Kakimoto, F.; Kalashev, O.; Kasahara, K.; Kasami, S.; Kawai, H.; Kawakami, S.; Kawana, S.; Kawata, K.; Kharuk, I.; Kido, E.; Kim, H.B.; Kim, J.H.; Kim, J.H.; Kim, M.H.; Kim, S.W.; Kimura, Y.; Kishigami, S.; Kubota, Y.; Kurisu, S.; Kuzmin, V.; Kuznetsov, M.; Kwon, Y.J.; Lee, K.H.; Lubsandorzhiev, B.; Lundquist, J.P.; Machida, K.; Matsumiya, H.; Matsuyama, T.; Matthews, J.N.; Mayta, R.; Minamino, M.; Mukai, K.; Myers, I.; Nagataki, S.; Nakai, K.; Nakamura, R.; Nakamura, T.; Nakamura, T.; Nakamura, Y.; Nakazawa, A.; Nishio, E.; Nonaka, T.; Oda, H.; Ogio, S.; Ohnishi, M.; Ohoka, H.; Oku, Y.; Okuda, T.; Omura, Y.; Ono, M.; Onogi, R.; Oshima, A.; Ozawa, S.; Park, I.H.; Potts, M.; Pshirkov, M.S.; Remington, J.; Rodriguez, D.C.; Rubtsov, G.I.; Ryu, D.; Sagawa, H.; Sahara, R.; Saito, Y.; Sakaki, N.; Sako, T.; Sakurai, N.; Sano, K.; Sato, K.; Seki, T.; Sekino, K.; Shah, P.D.; Shibasaki, Y.; Shibata, F.; Shibata, N.; Shibata, T.; Shimodaira, H.; Shin, B.K.; Shin, H.S.; Shinto, D.; Smith, J.D.; Sokolsky, P.; Sone, N.; Stokes, B.T.; Stroman, T.A.; Takagi, Y.; Takahashi, Y.; Takamura, M.; Takeda, M.; Takeishi, R.; Taketa, A.; Takita, M.; Tameda, Y.; Tanaka, H.; Tanaka, K.; Tanaka, M.; Tanoue, Y.; Thomas, S.B.; Thomson, G.B.; Tinyakov, P.; Tkachev, I.; Tokuno, H.; Tomida, T.; Troitsky, S.; Tsuda, R.; Tsunesada, Y.; Uchihori, Y.; Udo, S.; Uehama, T.; Urban, F.; Wong, T.; Yada, K.; Yamamoto, M.; Yamazaki, K.; Yang, J.; Yashiro, K.; Yoshida, F.; Yoshioka, Y.; Zhezher, Y.; Zundel, Z.

DOI: 10.22323/1.395.0358

발행일: 2022-03

유형: Conference Paper

저널명: Proceedings of Science

권: 395

페이지: 1 ~ 9