Testing a reported correlation between arrival directions of ultrahigh-energy cosmic rays and a flux pattern from nearby starburst galaxies using Telescope Array data
Telescope Array Collaboration, R. U. Abbasi, M. Abe, T. Abu-Zayyad, M. Allen, R. Azuma, E. Barcikowski, J. W. Belz, D. R. Bergman, S. A. Blake, R. Cady, B. G. C… 展开作者
Telescope Array Collaboration, R. U. Abbasi, M. Abe, T. Abu-Zayyad, M. Allen, R. Azuma, E. Barcikowski, J. W. Belz, D. R. Bergman, S. A. Blake, R. Cady, B. G. Cheon, J. Chiba, M. Chikawa, A. di Matteo, T. Fujii, K. Fujita, M. Fukushima, G. Furlich, T. Goto, W. Hanlon, M. Hayashi, Y. Hayashi, N. Hayashida, K. Hibino, K. Honda, D. Ikeda, N. Inoue, T. Ishii, R. Ishimori, H. Ito, D. Ivanov, H. M. Jeong, S. Jeong, C. C. H. Jui, K. Kadota, F. Kakimoto, O. Kalashev, K. Kasahara, H. Kawai, S. Kawakami, S. Kawana, K. Kawata, E. Kido, H. B. Kim, J. H. Kim, J. H. Kim, S. Kishigami, S. Kitamura, Y. Kitamura, V. Kuzmin, M. Kuznetsov, Y. J. Kwon, K. H. Lee, B. Lubsandorzhiev, J. P. Lundquist, K. Machida, K. Martens, T. Matsuyama, J. N. Matthews, R. Mayta, M. Minamino, K. Mukai, I. Myers, K. Nagasawa, S. Nagataki, R. Nakamura, T. Nakamura, T. Nonaka, H. Oda, S. Ogio, J. Ogura, M. Ohnishi, H. Ohoka, T. Okuda, Y. Omura, M. Ono, R. Onogi, A. Oshima, S. Ozawa, I. H. Park, M. S. Pshirkov, J. Remington, D. C. Rodriguez, G. Rubtsov, D. Ryu, H. Sagawa, R. Sahara, K. Saito, Y. Saito, N. Sakaki, N. Sakurai, L. M. Scott, T. Seki, K. Sekino, P. D. Shah, F. Shibata, T. Shibata, H. Shimodaira, B. K. Shin, H. S. Shin, J. D. Smith, P. Sokolsky, B. T. Stokes, S. R. Stratton, T. A. Stroman, T. Suzawa, Y. Takagi, Y. Takahashi, M. Takamura, M. Takeda, R. Takeishi, A. Taketa, M. Takita, Y. Tameda, H. Tanaka, K. Tanaka, M. Tanaka, S. B. Thomas, G. B. Thomson, P. Tinyakov, I. Tkachev, H. Tokuno, T. Tomida, S. Troitsky, Y. Tsunesada, K. Tsutsumi, Y. Uchihori, S. Udo, F. Urban, T. Wong, M. Yamamoto, R. Yamane, H. Yamaoka, K. Yamazaki, J. Yang, K. Yashiro, Y. Yoneda, S. Yoshida, H. Yoshii, Y. Zhezher, Z. Zundel
备注：
More accurate title, fixed an inconsistency in the declination range used, with a few figures slightly changing as a result, other minor revisions
Pierre Auger合作组织（Auger）最近报道了能量超过39 EeV的宇宙射线的到达方向与23个邻近星暴星系（SBG）的通量模式之间的相关性。在这封信中，我们使用望远镜阵列实验（TA）在2008年5月至2017年5月的9年期间探测到的宇宙射线来测试相同的假设。与俄歇分析不同，我们没有优化参数值，而是将它们固定在俄歇发现的最佳拟合值上，即假设源自列表中SBG的宇宙射线的各向异性分数为9.7%，相关性的角度尺度为12.9°。考虑到两个实验的能量尺度差异，我们采用的能量阈值为43 EeV，对应于Auger中的39 EeV。我们发现TA数据与各向同性在1.1σ内相容，与俄歇结果在1.4σ内相容，这意味着它不能区分这两种假设。
英文摘要：
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-year period from May 2008 to May 2017. 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 12.9° for the angular scale of the correlations. The energy threshold 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 1.1σ and with the Auger result to within 1.4σ, meaning that it is not capable to discriminate between these two hypotheses.
Toward a robust inference method for the likelihood of low-luminosity gamma-ray bursts to be progenitors of ultrahigh-energy cosmic rays correlating with starburst galaxies
Exploring the role of accretion shocks in galaxy clusters as sources of ultrahigh-energy cosmic rays
Instituto de Tecnologías en Detección y Astropartículas (ITeDA, CNEA-CONICET-UNSAM)（探测与天体粒子技术研究所）；Centro Atómico Constituyentes（孔斯蒂图延特斯原子中心）；Instituto de Astronomía y Física del Espacio (IAFE, CONICET-UBA)（天体物理学与空间物理研究所）
Isotropy constraints on powerful sources of ultrahigh-energy cosmic rays at $10^{19}$ eV
数值计算了强源产生的超高能宇宙射线（UHECR）到达方向分布的各向异性。我们表明，考虑到银河系磁场，在$\approx 10^{19}$电子伏特的显着各向异性的非检测目前和未来的实验施加一般上限UHECR质子光度稳定源源的函数的红移。上限限制了在局部宇宙中典型稳定源的存在，并限制了$10^{19}$ eV UHECR源的局部密度为$\gtrsim 10^{-3}$ Mpc $^{-3},$，假设平均星系际磁场小于$10^{-9}$ G。该各向同性比在最高能量下测量的更强，可以指示UHECR的瞬态生成。我们的各向异性计算适用于极端高频率峰值BL Lac对象1 ES 0229+200，1 ES 1101-232，和1 ES 0347-121，测试的UHECR诱导级联模型，其中束UHECR质子产生TeV的辐射在运输从源。虽然源周围的磁场结构影响耀变体所需的绝对宇宙射线光度，但银河系周围的磁场结构直接影响观测到的各向异性。如果这两个磁场都足够弱，那么皮埃尔·俄歇天文台应该可以探测到这些耀变体的明显的UHECR各向异性，除非UHECR质子的最大能量远低于$10^{19}$ eV。此外，如果这些是高于$10^{19}$ eV的UHECR的来源，则需要银河系周围的局部磁结构来解释在$\sim 10^{19}$ eV处观察到的各向同性，这可能与UHECR诱导的级联模型在合理的喷流功率下工作的所有星…
Seasonal Variation of Polar Ice: Implications for Ultrahigh Energy Neutrino Detectors
Interuniversity Institute for High Energies, Université Libre de Bruxelles（高能大学间研究所，布鲁塞尔自由大学）；Dept. of Physics and Astronomy, University of Kansas（堪萨斯大学物理与天文学系）
Highlights from the Pierre Auger Observatory (ICRC2019)
皮埃尔·俄歇天文台收集了15年多的数据，积累了世界上最大的高能宇宙射线（UHECR）照射量。UHECR的能谱已被测量到$10^{20.2}$ eV，并利用天文台的荧光和表面探测器对其质量组成进行了研究。对UHECR到达方向的分析使我们能够在三十多年的能量中测量它们的大尺度各向异性。目前正在进行中等尺度各向异性的搜索，暴露量约为$100,000$ km $^2$ sr yr。首次获得了$4 \times 10^{18}$ eV以上倾斜空气簇射中μ子数量的波动，而$10^{17.5}-10^{18.3}$ eV能量范围内的更多信息来自天文台地下散射器对μ子的直接测量。此外，我们还讨论了中性粒子通量的极限和从瞬变天体物理源中寻找UHE中微子的结果。目前的结果所开辟的新视角要求对天文台进行升级，其主要目的是收集关于最高能量宇宙射线的基本质量的新信息，以了解观测到的通量抑制的起源。介绍和讨论了天文台AugerPrime升级的进展情况。
Constraining models for the origin of ultra-high-energy cosmic rays with a novel combined analysis of arrival directions, spectrum, and composition data measured at the Pierre Auger Observatory
Search for correlations between the arrival directions of IceCube neutrino events and ultrahigh-energy cosmic rays detected by the Pierre Auger Observatory and the Telescope Array
Indications of Intermediate-Scale Anisotropy of Cosmic Rays with Energy Greater Than 57 EeV in the Northern Sky Measured with the Surface Detector of the Telescope Array Experiment
