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Title: Nonlinear QED effects in X-ray emission of pulsars

Abstract

In the presence of strong magnetic fields near pulsars, the QED vacuum becomes a birefringent medium due to nonlinear QED interactions. Here, we explore the impact of the effective photon-photon interaction on the polarization evolution of photons propagating through the magnetized QED vacuum of a pulsar. We solve the quantum Boltzmann equation within the framework of the Euler-Heisenberg Lagrangian to find the evolution of the Stokes parameters. We find that linearly polarized X-ray photons propagating outward in the magnetosphere of a rotating neutron star can acquire high values for the circular polarization parameter. Meanwhile, it is shown that the polarization characteristics of photons besides photon energy depend strongly on parameters of the pulsars such as magnetic field strength, inclination angle and rotational period. Our results are clear predictions of QED vacuum polarization effects in the near vicinity of magnetic stars which can be tested with the upcoming X-ray polarimetric observations.

Authors:
 [1];  [2];  [3]
  1. Department of Physics, Isfahan University of Technology, Isfahan 84156-83111 (Iran, Islamic Republic of)
  2. Department of Physics, Shiraz University, Shiraz 71946-84795 (Iran, Islamic Republic of)
  3. ICRANet, Piazzale della Repubblica 10, 65122, Pescara (Italy)
Publication Date:
OSTI Identifier:
22667654
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2017; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BOLTZMANN EQUATION; EMISSION; LAGRANGIAN FUNCTION; MAGNETIC FIELDS; MAGNETIC STARS; NEUTRON STARS; NEUTRONS; NONLINEAR PROBLEMS; PHOTON-PHOTON INTERACTIONS; PHOTONS; POLARIZATION; PULSARS; QUANTUM ELECTRODYNAMICS; STOKES PARAMETERS; VACUUM POLARIZATION; X RADIATION

Citation Formats

Shakeri, Soroush, Haghighat, Mansour, and Xue, She-Sheng, E-mail: Soroush.Shakeri@ph.iut.ac.ir, E-mail: m.haghighat@shirazu.ac.ir, E-mail: xue@icra.it. Nonlinear QED effects in X-ray emission of pulsars. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/10/014.
Shakeri, Soroush, Haghighat, Mansour, & Xue, She-Sheng, E-mail: Soroush.Shakeri@ph.iut.ac.ir, E-mail: m.haghighat@shirazu.ac.ir, E-mail: xue@icra.it. Nonlinear QED effects in X-ray emission of pulsars. United States. doi:10.1088/1475-7516/2017/10/014.
Shakeri, Soroush, Haghighat, Mansour, and Xue, She-Sheng, E-mail: Soroush.Shakeri@ph.iut.ac.ir, E-mail: m.haghighat@shirazu.ac.ir, E-mail: xue@icra.it. Sun . "Nonlinear QED effects in X-ray emission of pulsars". United States. doi:10.1088/1475-7516/2017/10/014.
@article{osti_22667654,
title = {Nonlinear QED effects in X-ray emission of pulsars},
author = {Shakeri, Soroush and Haghighat, Mansour and Xue, She-Sheng, E-mail: Soroush.Shakeri@ph.iut.ac.ir, E-mail: m.haghighat@shirazu.ac.ir, E-mail: xue@icra.it},
abstractNote = {In the presence of strong magnetic fields near pulsars, the QED vacuum becomes a birefringent medium due to nonlinear QED interactions. Here, we explore the impact of the effective photon-photon interaction on the polarization evolution of photons propagating through the magnetized QED vacuum of a pulsar. We solve the quantum Boltzmann equation within the framework of the Euler-Heisenberg Lagrangian to find the evolution of the Stokes parameters. We find that linearly polarized X-ray photons propagating outward in the magnetosphere of a rotating neutron star can acquire high values for the circular polarization parameter. Meanwhile, it is shown that the polarization characteristics of photons besides photon energy depend strongly on parameters of the pulsars such as magnetic field strength, inclination angle and rotational period. Our results are clear predictions of QED vacuum polarization effects in the near vicinity of magnetic stars which can be tested with the upcoming X-ray polarimetric observations.},
doi = {10.1088/1475-7516/2017/10/014},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 10,
volume = 2017,
place = {United States},
year = {Sun Oct 01 00:00:00 EDT 2017},
month = {Sun Oct 01 00:00:00 EDT 2017}
}