Due to technical problems on the CERN SSO system, logging in is currently failing for many users. Details on the SSB
July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

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

Jul 30, 2015, 2:00 PM
15m
Amazon (World Forum)

Amazon

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution GA-EX Parallel GA03 Pulsars

Speaker

Mathieu Chrétien (LPNHE CNRS/IN2P3)

Description

Constraining photon dispersion relation from observations of the Vela pulsar with H.E.S.S ------------------------------------------------------------------------ *M.Chrétien, J. Bolmont, A. Jacholkowska, for the H.E.S.S. collaboration* Some approaches to Quantum Gravity (QG) predict a modification of the dispersion relations also known as a Lorentz Invariance Violation. The effect is expected to affect photons near an effective QG energy scale. This value has been constrained by observing gamma rays emitted from variable astrophysical sources such as gamma-ray bursts and flaring active galactic nuclei. Pulsars are periodic transient sources with an extreme variability of ms time scale. In 2014, the H.E.S.S. experiment reported the detection above 30 GeV of gamma rays emitted every 89 ms from the Vela pulsar. 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 talk, the method and calibration procedure in use will be described and the results will be discussed.
Collaboration H.E.S.S.
Registration number following "ICRC2015-I/" 504

Primary author

Mathieu Chrétien (LPNHE CNRS/IN2P3)

Co-authors

Dr Agnieszka Jacholkowska (LPNHE CNRS/IN2P3) Dr Julien Bolmont (LPNHE UPMC/IN2P3)

Presentation materials

There are no materials yet.