Next Article in Journal
Effects of Atomic-Scale Electron Density Profile and a Fast and Efficient Iteration Algorithm for Matter Effect of Neutrino Oscillation
Next Article in Special Issue
Rotation and Spin and Position Operators in Relativistic Gravity and Quantum Electrodynamics
Previous Article in Journal / Special Issue
In the Quest for Cosmic Rotation
Open AccessArticle

Electrodynamics and Radiation from Rotating Neutron Star Magnetospheres

Observatoire Astronomique de Strasbourg, CNRS, Université de Strasbourg, UMR 7550, F-67000 Strasbourg, France
Universe 2020, 6(1), 15; https://doi.org/10.3390/universe6010015
Received: 22 November 2019 / Revised: 8 January 2020 / Accepted: 10 January 2020 / Published: 15 January 2020
(This article belongs to the Special Issue Rotation Effects in Relativity)
Neutron stars are compact objects rotating at high speed, up to a substantial fraction of the speed of light (up to 20% for millisecond pulsars) and possessing ultra-strong electromagnetic fields (close to and sometimes above the quantum critical field of 4.4 × 10 9 T ). Moreover, due to copious e ± pair creation within the magnetosphere, the relativistic plasma surrounding the star is forced into corotation up to the light cylinder where the corotation speed reaches the speed of light. The neutron star electromagnetic activity is powered by its rotation which becomes relativistic in the neighborhood of this light cylinder. These objects naturally induce relativistic rotation on macroscopic scales about several thousands of kilometers, a crucial ingredient to trigger the central engine as observed on Earth. In this paper, we elucidate some of the salient features of this corotating plasma subject to efficient particle acceleration and radiation, emphasizing several problems and limitations concerning current theories of neutron star magnetospheres. Relativistic rotation in these systems is indirectly probed by the radiation produced within the magnetosphere. Depending on the underlying assumptions about particle motion and radiation mechanisms, different signatures on their light curves, spectra, pulse profiles and polarization angles are expected in their broadband electromagnetic emission. We show that these measurements put stringent constraints on the way to describe particle electrodynamics in a rotating neutron star magnetosphere. View Full-Text
Keywords: neutron stars; magnetosphere; plasma; radiation; corotation; electrodynamics neutron stars; magnetosphere; plasma; radiation; corotation; electrodynamics
Show Figures

Figure 1

MDPI and ACS Style

Pétri, J. Electrodynamics and Radiation from Rotating Neutron Star Magnetospheres. Universe 2020, 6, 15. https://doi.org/10.3390/universe6010015

AMA Style

Pétri J. Electrodynamics and Radiation from Rotating Neutron Star Magnetospheres. Universe. 2020; 6(1):15. https://doi.org/10.3390/universe6010015

Chicago/Turabian Style

Pétri, Jérôme. 2020. "Electrodynamics and Radiation from Rotating Neutron Star Magnetospheres" Universe 6, no. 1: 15. https://doi.org/10.3390/universe6010015

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop