Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 천병구 | - |
dc.date.accessioned | 2022-04-18T06:45:54Z | - |
dc.date.available | 2022-04-18T06:45:54Z | - |
dc.date.issued | 2020-08 | - |
dc.identifier.citation | ASTROPHYSICAL JOURNAL, v. 899, no. 1, article no. 86 | en_US |
dc.identifier.issn | 0004-637X | - |
dc.identifier.issn | 1538-4357 | - |
dc.identifier.uri | https://iopscience.iop.org/article/10.3847/1538-4357/aba26c | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/170091 | - |
dc.description.abstract | 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. | en_US |
dc.description.sponsorship | The Telescope Array experiment is supported by the Japan Society for the Promotion of Science (JSPS) through Grants-in-Aid for Priority Area 431, Specially Promoted Research JP21000002, Scientific Research (S) JP19104006, Specially Promoted Research JP15H05693, Scientific Research (S) JP15H05741, Science Research (A) JP18H03705, and for Young Scientists (A) JPH26707011; by the joint research program of the Institute for Cosmic Ray Research (ICRR), The University of Tokyo; by the U.S. National Science Foundation awards PHY-0601915, PHY-1404495, PHY-1404502, and PHY-1607727; by the National Research Foundation of Korea (2016R1A2B4014967, 2016R1A5A1013277, 2017K1A4A3015188, 2017R1A2A1A05071429); by the Russian Academy of Sciences, RFBR grant 20-02-00625a (INR), IISN project No. 4.4502.13, and Belgian Science Policy under IUAP VII/37 (ULB). The foundations of Dr. Ezekiel R. and Edna Wattis Dumke, Willard L. Eccles, and George S. and Dolores Dore Eccles all helped with generous donations. The state of Utah supported the project through its Economic Development Board, and the University of Utah through the Office of the Vice President for Research. The experimental site became available through the cooperation of the Utah School and Institutional Trust Lands Administration (SITLA), US Bureau of Land Management (BLM), and the US Air Force. We appreciate the assistance of the State of Utah and Fillmore offices of the BLM in crafting the plan of development for the site. Patrick Shea assisted the collaboration with valuable advice on a variety of topics. The people and the officials of Millard County, Utah, have been a source of steadfast and warm support for our work which we greatly appreciate. We are indebted to the Millard County Road Department for their efforts to maintain and clear the roads which get us to our sites. We gratefully acknowledge the contribution from the technical staffs of our home institutions. An allocation of computer time from the Center for High Performance Computing at the University of Utah is gratefully acknowledged. | en_US |
dc.language.iso | en | en_US |
dc.publisher | IOP PUBLISHING LTD | en_US |
dc.subject | Extragalactic magnetic fields | en_US |
dc.subject | Ultra-high-energy cosmic radiation | en_US |
dc.subject | Cosmic rays | en_US |
dc.subject | High energy astrophysics | en_US |
dc.subject | Astrophysical magnetism | en_US |
dc.subject | Cosmic ray astronomy | en_US |
dc.subject | Cosmic ray sources | en_US |
dc.title | Evidence for a Supergalactic Structure of Magnetic Deflection Multiplets of Ultra-high-energy Cosmic Rays | en_US |
dc.type | Article | en_US |
dc.relation.no | 1 | - |
dc.relation.volume | 899 | - |
dc.identifier.doi | 10.3847/1538-4357/aba26c | - |
dc.relation.page | 86-86 | - |
dc.relation.journal | ASTROPHYSICAL JOURNAL | - |
dc.contributor.googleauthor | Abbasi, R. U. | - |
dc.contributor.googleauthor | Abe, M. | - |
dc.contributor.googleauthor | Abu-Zayyad, T. | - |
dc.contributor.googleauthor | Allen, M. | - |
dc.contributor.googleauthor | Azuma, R. | - |
dc.contributor.googleauthor | Barcikowski, E. | - |
dc.contributor.googleauthor | Belz, J. W. | - |
dc.contributor.googleauthor | Bergman, D. R. | - |
dc.contributor.googleauthor | Blake, S. A. | - |
dc.contributor.googleauthor | Cheon, B. G. | - |
dc.relation.code | 2020049477 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF NATURAL SCIENCES[S] | - |
dc.sector.department | DEPARTMENT OF PHYSICS | - |
dc.identifier.pid | bgcheon | - |
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