| Title: | Telescope Array Hot/Coldspot Study – Intermediate Scale Anisotropy |
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| Authors: | ID Lundquist, Jon Paul, UNG (Author) |
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| Files: |
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| Language: | English |
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| Work type: | Not categorized |
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| Typology: | 1.12 - Published Scientific Conference Contribution Abstract |
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| Organization: | UNG - University of Nova Gorica
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| Abstract: | Indications of energy dependent intermediate scale anisotropy has been found in the arrival directions of ultra high energy cosmic rays with energies above 20 EeV in the northern hemisphere, using 7 years of TA surface detector data. The previously reported “hotspot‘” excess for E>57 EeV is found to correspond to a deficit, or “coldspot ”, of events for energies 20<E<57 EeV. At the center of maximum combined significance the excess for energies E>57 EeV has a Li Ma statistical significance of 4.62σ, and the deficit for energies 20<E<57 EeV a significance of 3.23σ. This combined feature is centered at R.A. = 146°, decl. = 47° (3° degrees from previously reported hotspot) and is 17°from the supergalactic plane. The hot/ coldspot feature suggests energy dependent magnetic deflection of
the isotropic background and cosmic rays from a source. |
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| Keywords: | cosmic rays, energy spectrum, anisotropy, magnetic deflection |
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| Place of performance: | APS April Meeting |
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| Year of performance: | 2016 |
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| PID: | 20.500.12556/RUNG-5164-2f6577a5-bbb3-b2a7-0558-063d5f042ef6 |
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| COBISS.SI-ID: | 12884995 |
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| NUK URN: | URN:SI:UNG:REP:0JBGTFPW |
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| Publication date in RUNG: | 28.04.2020 |
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| Views: | 2695 |
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| Downloads: | 0 |
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