Cosmic ray acceleration to ultrahigh energy in radio galaxies

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F19%3A00536089" target="_blank" >RIV/67985815:_____/19:00536089 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1051/epjconf/201921004002" target="_blank" >https://doi.org/10.1051/epjconf/201921004002</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/epjconf/201921004002" target="_blank" >10.1051/epjconf/201921004002</a>

Result language
angličtina
Original language name
Cosmic ray acceleration to ultrahigh energy in radio galaxies
Original language description
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.
Czech name
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Czech description
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Project
<a href="/en/project/GB14-37086G" target="_blank" >GB14-37086G: Albert Einstein Center for Gravitation and Astrophysics</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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