Journal article

Cosmic ray acceleration to ultrahigh energy in radio galaxies

Abstract:: The origin of ultrahigh energy cosmic rays (UHECRs) is an open question. In this proceeding, we first review the general physical requirements that a source must meet for acceleration to 10-100 EeV, including the consideration that the shock is not highly relativistic. We show that shocks in the backflows of radio galaxies can meet these requirements. We discuss a model in which giant-lobed radio galaxies such as Centaurus A and Fornax A act as slowly-leaking UHECR reservoirs, with the UHECRs being accelerated during a more powerful past episode. We also show that Centaurus A, Fornax A and other radio galaxies may explain the observed anisotropies in data from the Pierre Auger Observatory, before examining some of the difficulties in associating UHECR anisotropies with astrophysical sources.

Publication status:: Published

Peer review status:: Peer reviewed

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APA Style

Matthews, J., Bell, A., Araudo, A., & Blundell, K. (2019). Cosmic ray acceleration to ultrahigh energy in radio galaxies. EPJ Web of Conferences, 210.

MLA Style

Matthews, J., et al. “Cosmic Ray Acceleration to Ultrahigh Energy in Radio Galaxies.” EPJ Web of Conferences, vol. 210, EDP Sciences, 2019.

Chicago Style

Matthews, J, A Bell, A Araudo, and K Blundell. 2019. “Cosmic Ray Acceleration to Ultrahigh Energy in Radio Galaxies.” EPJ Web of Conferences 210.
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Files:: epjconf_uhecr18_04002.pdf

(Preview, Version of record, pdf, 1.7MB, Terms of use)

Publisher copy:: 10.1051/epjconf/201921004002

Authors

+ Matthews, J More by this author

Institution:: University of Oxford
Division:: MPLS Division
Department:: Physics
Sub department:: Astrophysics
Department:: ASTROPHYSICS
Role:: Author
ORCID:: 0000-0002-3493-7737

+ Bell, A More by this author

Institution:: University of Oxford
Division:: MPLS Division
Department:: Physics
Role:: Author

+ Araudo, A More by this author

Role:: Author

+ Blundell, K More by this author

Institution:: University of Oxford
Division:: MPLS Division
Department:: Physics
Sub department:: Astrophysics
Role:: Author

Publisher:: EDP Sciences
Journal:: EPJ Web of Conferences More from this journal
Volume:: 210
Article number:: 04002
Publication date:: 2019-05-17
Acceptance date:: 2019-05-17
DOI:: 10.1051/epjconf/201921004002
EISSN:: 2100-014X

Keywords:: astro-ph.GA

astro-ph.HE
Pubs id:: pubs:979931
UUID:: uuid:8a8279e3-a86f-4420-bff8-978661d1ead6
Local pid:: pubs:979931
Source identifiers:: 979931
Deposit date:: 2019-06-20

Terms of use

Copyright holder:: Matthews et al
Copyright date:: 2019
Notes:: Copyright © The Authors, published by EDP Sciences, 2019.
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Licence:: CC Attribution (CC BY)

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