Constraining Axion-Like Particles from observations of AGN B2 2234+28A and 3C 454.3

2024/11/13 by Yu-Chong Chen, Siyu Chen, Chen, Yu-Chong +6
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #Cosmology and Gravitation Theories

paper · pdf · doi:10.48550/arxiv.2411.08577

Abstract

Axion-photon oscillation effect provides a possible explanation for the presence of very-high-energy (VHE) γ-ray signals from distant sources. In this work, we propose a model-dependent method to select possible sources that may give sufficient constraints on the axion parameters. We investigate such effect in the spectra of active galactic nuclei (AGN) B2 2234+28A and 3C 454.3 based on data obtained from Fermi Large Area Telescope (Fermi-LAT) and MAGIC U.L. We utilize the Markov Chain Monte Carlo method to fit the axion parameters, yielding a result of g_aγ=3.05^+0.51_-0.31 × 10^-11 GeV^-1 for the axion-photon coupling strength and m_a=5.25^+2.35_-2.65 × 10^-8 eV for the axion mass. We also perform 95% confidence level (CL) constraints to set an upper limit for g_aγ.

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