The implications of the axion like particle from the Fermi-LAT and H.E.S.S. observations of PG 1553+113 and PKS 2155-304

18 Feb 2020 Guo Junguang Li Hai-Jun Bi Xiao-Jun Lin Su-Jie Yin Peng-Fei

We investigate the axion like particle (ALP)-photon oscillation effect in the high energy $\gamma$-ray spectra of PG 1553+113 and PKS 2155-304 measured by Fermi-LAT and H.E.S.S.. The choice of extragalactic background light (EBL) model, which induces the attenuate effect in observed $\gamma$-ray spectra, would affect the ALP implication... (read more)

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  • HIGH ENERGY ASTROPHYSICAL PHENOMENA
  • HIGH ENERGY PHYSICS - PHENOMENOLOGY