Science Case for a Wide Field-of-View Very-High-Energy Gamma-Ray Observatory in the Southern Hemisphere
A. Albert, R. Alfaro, H. Ashkar, C. Alvarez, J. Álvarez, J. C. Arteaga-Velázquez, H. A. Ayala Solares, R. Arceo, J. A. Bellido, S. BenZvi, T. Bretz, C. A. Brisb… 展开作者
A. Albert, R. Alfaro, H. Ashkar, C. Alvarez, J. Álvarez, J. C. Arteaga-Velázquez, H. A. Ayala Solares, R. Arceo, J. A. Bellido, S. BenZvi, T. Bretz, C. A. Brisbois, A. M. Brown, F. Brun, K. S. Caballero-Mora, A. Carosi, A. Carramiñana, S. Casanova, P. M. Chadwick, G. Cotter, S. Coutiño De León, P. Cristofari, S. Dasso, E. de la Fuente, B. L. Dingus, P. Desiati, F. de O. Salles, V. de Souza, D. Dorner, J. C. Díaz-Vélez, J. A. García-González, M. A. DuVernois, G. Di Sciascio, K. Engel, H. Fleischhack, N. Fraija, S. Funk, J-F. Glicenstein, J. Gonzalez, M. M. González, J. A. Goodman, J. P. Harding, A. Haungs, J. Hinton, B. Hona, D. Hoyos, P. Huentemeyer, A. Iriarte, A. Jardin-Blicq, V. Joshi, S. Kaufmann, K. Kawata, S. Kunwar, J. Lefaucheur, J. -P. Lenain, K. Link, R. López-Coto, V. Marandon, M. Mariotti, J. Martínez-Castro, H. Martínez-Huerta, M. Mostafá, A. Nayerhoda, L. Nellen, E. de Oña Wilhelmi, R. D. Parsons, B. Patricelli, A. Pichel, Q. Piel, E. Prandini, E. Pueschel, S. Procureur, A. Reisenegger, C. Rivière, J. Rodriguez, A. C. Rovero, G. Rowell, E. L. Ruiz-Velasco, A. Sandoval, M. Santander, T. Sako, T. K. Sako, K. Satalecka, H. Schoorlemmer, F. Schüssler, M. Seglar-Arroyo, A. J. Smith, S. Spencer, P. Surajbali, E. Tabachnick, A. M. Taylor, O. Tibolla, I. Torres, B. Vallage, A. Viana, J. J. Watson, T. Weisgarber, F. Werner, R. White, R. Wischnewski, R. Yang, A. Zepeda, H. Zhou
We outline the science motivation for SGSO, the Southern Gamma-Ray Survey Observatory. SGSO will be a next-generation wide field-of-view gamma-ray survey instrument, sensitive to gamma-rays in the energy range from 100 GeV to hundreds of TeV. Its science topics include unveiling galactic and extragalactic particle accelerators, monitoring the transient sky at very high energies, probing particle physics beyond the Standard Model, and the characterization of the cosmic ray flux. SGSO will consist of an air shower detector array, located in South America. Due to its location and large field of view, SGSO will be complementary to other current and planned gamma-ray observatories such as HAWC, LHAASO, and CTA.
Identification of a Large-Scale Diffuse Gamma-Ray Structure in the Southern Galactic Hemisphere
School of Astronomy and Space Science, University of Science and Technology of China（中国科学技术大学天文与空间科学学院）；Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences（中国科学院紫金山天文台暗物质与空间天文重点实验室）
Further Evidence for an Increase of the Mean Mass of the Highest-Energy Cosmic-Rays with Energy
索科尔斯基和D_阿维尼翁最近报告了对各种测量的检验，这些测量与最高能量宇宙射线的质量组成如何随能量演化的问题有关。他们断言，从北半球到达的宇宙射线与从南半球到达的宇宙射线具有不同的质量组成，这意味着两个半球的高能宇宙射线源的多样性。如果这个结论是正确的，它将对宇宙射线起源理论产生深远的影响，并将影响未来项目的规划。因此，他们的主张值得仔细审查。在本文中，他们的分析进行了详细的审查，与判决是，证据的北/南差异是没有得到证明，一个结论支持的其他数据从北半球和南半球。然而，最重要的是，Sokolsky和D_Avignon的研究为皮埃尔·奥杰合作组织在2014年提出的宇宙射线的平均质量随着能量超过~3 E eV而增加的说法提供了期待已久的确认。
