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Title:Very high-energy gamma-ray signature of ultrahigh-energy cosmic-ray acceleration in Centaurus A
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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Work type:Not categorized
Typology:1.12 - Published Scientific Conference Contribution Abstract
Organization:UNG - University of Nova Gorica
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.
Keywords:Centaurus A, gamma ray, cosmic rays
Year of publishing:2017
PID:20.500.12556/RUNG-3544-e50fc6d7-f2e4-c06b-f508-03618e5fead1 New window
COBISS.SI-ID:4990971 New window
Publication date in RUNG:17.01.2018
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Record is a part of a monograph

Title:The 29th Texas Symposium on Relativistic Astrophysics
Place of publishing:South Africa
Year of publishing:2017