Polarisation of high energy gamma-rays after scattering
arXiv:1903.11074 · doi:10.1088/1475-7516/2019/12/041
Abstract
The polarisation of sunlight after scattering off the atmosphere was first described by Chandrasekhar using a geometrical description of Rayleigh interactions. Kosowsky later extended Chandrasekhar's formalism by using Quantum Field Theory (QFT) to describe the polarisation of the Cosmological Microwave Background radiation. Here we focus on a case that is rarely discussed in the literature, namely the polarisation of high energy radiation after scattering off particles. After demonstrating why the geometrical and low energy QFT approaches fail in this case, we establish the transport formalism that allows to describe the change of polarisation of high energy photons when they propagate through space or the atmosphere. We primarily focus on Compton interactions but our approach is general enough to describe e.g. the scattering of high energy photons off new particles or through new interactions. Finally we determine the conditions for a circularly polarised --ray signal to keep the same level of circular polarisation as it propagates through its environment.
arXiv comment34 pages, 8 figures, 6 appendices, typos corrected, explanations and references added, matches JCAP published version
References in corpus (37)
- Cosmic Microwave Background Polarization
- Faraday Rotation of Microwave Background Polarization by a Primordial Magnetic Field
- X-Ray and Gamma-Ray Polarization in Leptonic and Hadronic Jet Models of Blazars
- The Spectrum and Variability of Circular Polarization in Sagittarius A* from 1.4 to 15 GHz
- Dark matter-neutrino interactions through the lens of their cosmological implications
- Circular Polarization of Radio Emission from Relativistic Jets
- Detection of Circular Polarization in the Galactic Center Black Hole Candidate Sagittarius A*
- Synchrotron Polarization in Blazars
- Parsec-Scale Circular Polarization Observations of 40 Blazars
- The Linear Polarization of Sagittarius A* I. VLA Spectro-polarimetry at 4.8 and 8.4 GHz
- Is the Cosmic Microwave Background Circularly Polarized?
- Does circular polarisation reveal the rotation of quasar engines?
- Compton scattering of twisted light: angular distribution and polarization of scattered photons
- Confirmation and Analysis of Circular Polarization from Sagittarius A*
- A New Limit on CMB Circular Polarization from SPIDER
- Discovery of circularly polarised radio emission from SS 433
- Generation of Circular Polarization of the Cosmic Microwave Background
- Detection of Circular Polarization in M81*
- Circular Polarization of the CMB: A probe of the First stars
- Evidence for cosmic neutrino background form CMB circular polarization
- The V-mode polarization of the Cosmic Microwave Background
- Circular polarization of the CMB: Foregrounds and detection prospects
- Exploring circular polarization in the CMB due to conventional sources of cosmic birefringence
- Gamma-ray Signals from Dark Matter Annihilation Via Charged Mediators
- CMB circular and B-mode polarization from new interactions
- Generation of circular polarization in CMB radiation via nonlinear photon-photon interaction
- Linear Polarization, Circular Polarization, and Depolarization of Gamma-ray Bursts: A Simple Case of Jitter Radiation
- Polarization Insights for Active Galactic Nuclei
- Polarization of a probe laser beam due to nonlinear QED effects
- Polarization of photons emitted by decaying dark matter
- Detecting primordial gravitational waves with circular polarization of the redshifted 21 cm line: I. Formalism
- Circular polarisation of synchrotron radiation in high magnetic fields
- On the Prospects for Detecting a Net Photon Circular Polarization Produced by Decaying Dark Matter
- Detecting primordial gravitational waves with circular polarization of the redshifted 21 cm line: II. Forecasts
- Clarifying the covariant formalism for the SZ effect due to relativistic non-thermal electrons
- Polarized gamma rays from dark matter annihilations
- Using Circular Polarisation to Test the Composition and Dynamics of Astrophysical Particle Accelerators