| Title: | Very high-energy gamma-ray signature of ultrahigh-energy cosmic-ray acceleration in Centaurus A |
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| Authors: | ID Joshi, Jagdish, University Of Johannesburg (Author)
ID Miranda, Marlui, University Of Johannesburg (Author)
ID Yang, Lili, University of Nova Gorica (Author)
ID Razzaque, Soebur, University Of Johannesburg (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: | The association of at least a dozen ultrahigh-energy cosmic-ray (UHECR) events with energy 54 EeV or higher detected by the Pierre Auger Observatory from the direction of Centaurus-A, the nearest radio galaxy, supports the scenario of UHECR acceleration in the jets of radio galaxies. Multiwavelength observations of Centaurus-A suggest that the inner jet is likely the site for particle acceleration, which emits in X-ray to very high-energy (VHE) gamma-ray. We model broadband spectral energy distribution with emission from shock-accelerated electrons and protons in a combined synchrotron-self-Compton and photo-hadronic scenario. The UHECR flux from Centaurus-A, required to explain Pierre Auger data, successfully explains observed VHE gamma rays as photo-hadronic emission. |
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| Keywords: | Centaurus A, gamma ray, cosmic rays |
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| Year of publishing: | 2017 |
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| PID: | 20.500.12556/RUNG-3544-e50fc6d7-f2e4-c06b-f508-03618e5fead1 |
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| COBISS.SI-ID: | 4990971 |
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| NUK URN: | URN:SI:UNG:REP:O34EIVFT |
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| Publication date in RUNG: | 17.01.2018 |
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| Views: | 4194 |
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| Downloads: | 0 |
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