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Prospects of detecting a large-scale anisotropy of ultra-high-energy cosmic rays from a nearby source with the K-EUSO orbital telescopeстатья Исследовательская статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 28 февраля 2020 г.
- Авторы: Kalashev Oleg, Pshirkov Maxim, Zotov Mikhail
- Журнал: Journal of Cosmology and Astroparticle Physics
- Том: 2019
- Номер: 09
- Год издания: 2019
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- Первая страница: 034
- Последняя страница: 034
- DOI: 10.1088/1475-7516/2019/09/034
- Аннотация: KLYPVE-EUSO (K-EUSO) is a planned orbital detector of ultra-high-energy cosmic rays (UHECRs), which is to be deployed on board the International Space Station. K-EUSO is expected to have a uniform exposure over the celestial sphere and register from 120 to 500 UHECRs at energies above 57 EeV in a 2-year mission. We employed the TransportCR and CRPropa 3 packages to estimate prospects of detecting a large-scale anisotropy of ultra-high-energy cosmic rays from a nearby source with K-EUSO. Nearby active galactic nuclei Centaurus A, M82, NGC 253, M87 and Fornax A were considered as possible sources of UHECRs. A minimal model for extragalactic cosmic rays and neutrinos by Kachelrieß, Kalashev, Ostapchenko and Semikoz (2017) was chosen for definiteness. We demonstrate that an observation of ≳300 events will allow detecting a large-scale anisotropy with a high confidence level providing the fraction of from-source events is ≃10–15%, depending on a particular source. The threshold fraction decreases with an increasing sample size. We also discuss if an overdensity originating from a nearby source can be observed at around the ankle in case a similar anisotropy is found beyond 57 EeV. The results are generic and hold for other future experiments with a uniform exposure of the celestial sphere.
- Добавил в систему: Зотов Михаил Юрьевич