Constraining photon dispersion relation from observations of the Vela pulsar with H.E.S.S - Archive ouverte HAL
Communication Dans Un Congrès Année : 2016

Constraining photon dispersion relation from observations of the Vela pulsar with H.E.S.S

Résumé

Some approaches to Quantum Gravity (QG) predict a modification of photon dispersion relations due to a breaking of Lorentz invariance. The effect is expected to affect photons near an effective QG energy scale. This scale has been constrained by observing gamma rays emitted from variable astrophysical sources such as gamma-ray bursts and flaring active galactic nuclei. Pulsars exhibit a periodic emission of possibly ms time scale. In 2014, the H.E.S.S. experiment reported the detection down to 20 GeV of gamma rays from the Vela pulsar having a periodicity of 89 ms. Using a likelihood analysis, calibrated with a dedicated Monte-Carlo procedure, we obtain the first limit on QG energy scale with the Vela pulsar. In this paper, the method and calibration procedure in use will be described and the results will be discussed.

Dates et versions

hal-03626584 , version 1 (31-03-2022)

Identifiants

Citer

Mathieu Chrétien, Julien Bolmont, Agnieszka Jacholkowski. Constraining photon dispersion relation from observations of the Vela pulsar with H.E.S.S. 34th International Cosmic Ray Conference, Jul 2015, The Hague, Netherlands. pp.764, ⟨10.22323/1.236.0764⟩. ⟨hal-03626584⟩
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