Aug 27 – 31, 2018
LVH, Luisenstraße 58, 10117 Berlin
Europe/Berlin timezone

Extragalactic photon--axion-like particle oscillations

Aug 28, 2018, 3:45 PM
1h
LVH, Luisenstraße 58, 10117 Berlin

LVH, Luisenstraße 58, 10117 Berlin

<a href="http://www.langenbeck-virchow-haus.de/" target="_blank"><b>LANGENBECK VIRCHOW HAUS</b></a> Luisenstraße 58, 10117 Berlin
Board: GR20
Poster (A0 portrait) Gamma-rays Poster Session and Coffee Break

Speaker

Dr Giorgio Galanti (INAF, Osservatorio Astronomico di Brera)

Description

Axion-like particles (ALPs) are very light, neutral, pseudo-scalar bosons which are supposed to interact with two photons. They can give rise to very interesting astrophysical effects taking place in the very-high energy band and above (10 GeV – 1000 TeV) when an external magnetic field is present. We analyze the propagation of the photon-ALP beam generated as pure photons at the jet base of a BL Lac, we study the photon-ALP oscillations during its path up to us while crossing the BL Lac magnetic field, the intergalactic magnetic field which we describe by means of an improved model and the Milky Way magnetic field. Our results are of great importance for the new generation of gamma-ray observatories like CTA, HAWC, GAMMA-400, LHAASO and TAIGA-HiSCORE.

Primary authors

Dr Carmelo Evoli (II. Institut für Theoretische Physik, Universität Hamburg) Dr Fabrizio Tavecchio (INAF, Osservatorio Astronomico di Brera) Dr Giorgio Galanti (INAF, Osservatorio Astronomico di Brera) Dr Marco Roncadelli (INFN - Pavia)

Presentation materials

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