Polarized Images of Synchrotron Radiations in Curved Spacetime

Abstract

In this work, we derive two formulas encoding the polarization direction and luminosity of synchrotron radiations from the moving electrons in curved spacetime under the geometric optics approximation. As an application, we further study the polarized images of synchrotron radiations from electron sources in Schwarzschild black hole spacetime with a vertical and uniform magnetic field. In particular, by focusing on the circular orbits of electrons on the equatorial plane, we show the polarized images of the synchrotron radiations from these orbits for different observational angles and discuss the variations of the polarization directions concerning the angles.

25 pages, 6 figures, accepted in EPJC

References in corpus (15)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon
• First M87 Event Horizon Telescope Results. VII. Polarization of the Ring
• Lensing by Kerr Black Holes
• Motion of charged particles near weakly magnetized Schwarzschild black hole
• The Polarized Image of a Synchrotron Emitting Ring of Gas Orbiting a Black Hole
• Polarized Image of Equatorial Emission in the Kerr Geometry
• Discriminating Accretion States via Rotational Symmetry in Simulated Polarimetric Images of M87
• Polarized image of a Schwarzschild black hole with a thin accretion disk as photon couples to Weyl tensor
• Black Hole Magnetic Fields and Their Imprint on Circular Polarization Images
• Observational signature of a near-extremal Kerr-Sen black hole in the heterotic string theory
• Predicting the X-ray polarization of type-2 Seyfert galaxies
• Gravitomagnetic interaction of a Kerr black hole with a magnetic field as the source of the jetted GeV radiation of gamma-ray bursts
• Charged Particles Circular Orbits around Weakly Charged and Magnetized Kerr Black Holes
• Electromagnetic signatures of strong-field gravity from accreting black holes

Cited by in corpus (5)

• Circular orbits and polarized images of charged particles orbiting Kerr black hole with a weak magnetic field
• How different are shadows of compact objects with and without horizons?
• How Spatially Resolved Polarimetry Informs Black Hole Accretion Flow Models
• Probing Observable Features of Lorentz violation in Low-Energy Hořava Gravity with Accretion Disk Images of Black Hole
• Can synchrotron radiation reveal the presence of {\it dark sector} around black hole?