Probing stochastic inter-galactic magnetic fields using blazar-induced gamma ray halo morphology
arXiv:1701.01501 · doi:10.1088/1475-7516/2017/05/005
Abstract
Inter-galactic magnetic fields can imprint their structure on the morphology of blazar-induced gamma ray halos. We show that the halo morphology arises through the interplay of the source's jet and a two-dimensional surface dictated by the magnetic field. Through extensive numerical simulations, we generate mock halos created by stochastic magnetic fields with and without helicity, and study the dependence of the halo features on the properties of the magnetic field. We propose a sharper version of the Q-statistics and demonstrate its sensitivity to the magnetic field strength, the coherence scale, and the handedness of the helicity. We also identify and explain a new feature of the Q-statistics that can further enhance its power.
v2: 23 pages, 17 figures. This version has an improved analysis of the electromagnetic cascade and matches the version published in JCAP
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Cited by in corpus (8)
- Progress on Cosmological Magnetic Fields
- The Gamma-Ray Window to Intergalactic Magnetism
- Missing Gamma-ray Halos and the Need for New Physics in the Gamma-ray Sky
- Magnetic field production at a first-order electroweak phase transition
- Bow Ties in the Sky II: Searching for Gamma-ray Halos in the Fermi Sky Using Anisotropy
- Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review
- On the Measurement of the Helicity of Intergalactic Magnetic Fields Using Ultra-High-Energy Cosmic Rays
- On the measurement of handedness in Fermi Large Area Telescope data