Particle acceleration and magnetic field amplification in the termination shocks of AGN jets

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F18%3A00500105" target="_blank" >RIV/67985815:_____/18:00500105 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Particle acceleration and magnetic field amplification in the termination shocks of AGN jets

Popis výsledku v původním jazyce

Relativistic shocks in extragalactic sources have been proposed as sources of ultra high energy cosmic rays. However, theoretical advances indicate that relativistic shocks are unable to accelerate particles to energies largen than 1 PeV. We study relativistic jets in Active Galactic Nuclei, where the maximum energy of electrons accelerated in the termination shocks is 1 TeV. We show that this maximum energy cannot be constrained by synchrotron losses as usually assumed, and we propose that it is determined by the geometry of the (unperturbed) magnetic field. If the maximum energy of electrons is determined by the perpendicular magnetic field, the same limit applies to protons and therefore the maximum energy of ions is also 1 TeV. As a consequence, relativistic jet termination shocks are poor cosmic ray accelerators.

Název v anglickém jazyce

Particle acceleration and magnetic field amplification in the termination shocks of AGN jets

Popis výsledku anglicky

Relativistic shocks in extragalactic sources have been proposed as sources of ultra high energy cosmic rays. However, theoretical advances indicate that relativistic shocks are unable to accelerate particles to energies largen than 1 PeV. We study relativistic jets in Active Galactic Nuclei, where the maximum energy of electrons accelerated in the termination shocks is 1 TeV. We show that this maximum energy cannot be constrained by synchrotron losses as usually assumed, and we propose that it is determined by the geometry of the (unperturbed) magnetic field. If the maximum energy of electrons is determined by the perpendicular magnetic field, the same limit applies to protons and therefore the maximum energy of ions is also 1 TeV. As a consequence, relativistic jet termination shocks are poor cosmic ray accelerators.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GB14-37086G" target="_blank" >GB14-37086G: Centrum Alberta Einsteina pro gravitaci a astrofyziku</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Boletín de la Asociación Argentina de Astronomía

ISSN

1669-9521

e-ISSN

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Svazek periodika

60

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

AR - Argentinská republika

Počet stran výsledku

7

Strana od-do

79-85

Kód UT WoS článku

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EID výsledku v databázi Scopus

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