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Modulations in Spectra of Galactic Gamma-ray sources as a result of photon-ALPs mixing

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Referee this paper: arXiv:1710.09894 by Jhilik Majumdar, Francesca Calore, (show more)

Please use comments to point to previous work in this direction, and reviews to referee the accuracy of the paper. Feel free to edit this submission to summarise the paper (just click on edit, your summary will then appear under the horizontal line)

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Axion like particles (ALPs) are fundamental pseudo scalar particles with properties similar to Axions which are a well-known extension of the standard model to solve the strong CP problem in Quantum Chromodynamics. ALPs can oscillate into photons and vice versa in the presence of an external tranversal magnetic field. This oscillation of photon and ALPs could have important implications for astronomical observations, i.e. a characteristic energy dependent attenuation in Gamma ray spectra for astrophysical sources. Here we have revisited the opportunity to search Photon-ALPs coupling in the disappearance channel. We use eight years of Fermi Pass 8 data of a selection of promising galactic Gamma-ray source candidates and study the modulation in the spectra in accordance with Photon-ALPs mixing and estimate best fit values of the parameters i.e. Photon-ALPs coupling constant(gαγγ) and ALPs mass(mα). For the magnetic field we use large scale galactic magnetic field models based on Faraday rotation measurements and we have also studied the survival probability of photons in the Galactic plane.

requested 6 days ago by Jia Yiyang (2465 points)
summarized by Jia Yiyang
paper authored Oct 24 to astro-ph by  (no author on PO assigned yet) 
  • [ revision history ]
    edited 6 days ago by Jia Yiyang

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