Abstract
Recent analyses of very high energy (VHE; >100 GeV) blazar spectra have shown evidence for an excess of γ-rays when attenuation by extragalactic background light (EBL) is expected to be high. A possible explanation for this anomaly is secondary γ-rays from ultra-high-energy cosmic rays (UHECRs) interacting with background photons. If the intergalactic magnetic field strength is sufficiently small, these UHECRs could travel straight enough for long enough that the secondary VHE γ-rays would appear point-like for existing imaging atmospheric Cherenkov telescopes. We will show results from a study using the publicly available UHECR propagation code CRPropa to investigate the cosmic-ray power and spectrum required to account for the anomaly as well as the impact of a range of EBL models.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013 |
| Publisher | Sociedade Brasileira de Fisica |
| ISBN (Electronic) | 9788589064293 |
| State | Published - 2013 |
| Event | 33rd International Cosmic Rays Conference, ICRC 2013 - Rio de Janeiro, Brazil Duration: Jul 2 2013 → Jul 9 2013 |
Publication series
| Name | Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013 |
|---|---|
| Volume | 2013-October |
Other
| Other | 33rd International Cosmic Rays Conference, ICRC 2013 |
|---|---|
| Country/Territory | Brazil |
| City | Rio de Janeiro |
| Period | 7/2/13 → 7/9/13 |
Bibliographical note
Publisher Copyright:© 2013 Sociedade Brasileira de Fisica. All Rights Reserved.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
Keywords
- Blazars
- Gamma rays
- Icrc2013
- UHECRs