Simulations of the radio polarization of a precessing pulsar PSR J1906+0746
arXiv:2008.13750 · doi:10.1093/mnras/staa2070
Abstract
The recently constructed theory of radio wave propagation in the pulsar magnetosphere outlines the general aspects of the radio light curve and polarization formation. It allows us to describe general properties of mean profiles, such as the position angle () of the linear polarization, and the circular polarization for the realistic structure of the pair creation region in the pulsar magnetosphere. In this work, we present an application of the radio wave propagation theory to the radio observations of pulsar PSR J1906+0746. This pulsar is particularly interesting because observations of relativistic spin-precession in a binary system allows us to put strong constraints on its geometry. Because it is an almost orthogonal rotator, the pulsar allows us to observe both magnetic poles; as we show, this is crucial for testing the theory of radio wave propagation and obtaining constraints on the parameters of magnetospheric plasma. Our results show that plasma parameters are qualitatively consistent with theories of pair plasma production in polar cap discharges. Specifically, for PSR J1906+0746, we constrain the plasma multiplicity and the Lorentz-factor of secondary plasma a few hundred.
arXiv comment9 pages, 4 figures. Published in MNRAS
References in corpus (22)
- The Parkes Multibeam Pulsar Survey: I. Observing and Data Analysis Systems, Discovery and Timing of 100 Pulsars
- Modeling of Gamma-Ray Pulsar Light Curves with Force-Free Magnetic Field
- Current Flow and Pair Creation at Low Altitude in Rotation Powered Pulsars' Force-Free Magnetospheres: Space-Charge Limited Flow
- Time-dependent pair cascades in magnetospheres of neutron stars I. Dynamics of the polar cap cascade with no particle supply from the neutron star surface
- On the polar cap cascade pair multiplicity of young pulsars
- Profile and polarization characteristics of energetic pulsars
- A NICER view of PSR J0030+0451: evidence for a global-scale multipolar magnetic field
- Polarimetry of 600 pulsars from observations at 1.4 GHz with the Parkes radio telescope
- The young, highly relativistic binary pulsar J1906+0746
- Radio emission from a pulsar's magnetic pole revealed by general relativity
- Polarization Changes of Pulsars due to Wave Propagation Through Magnetospheres
- Polar-cap accelerator and radio emission from pulsars
- On the mean profiles of radio pulsars I: Theory of the propagation effects
- Radio pulsars: already fifty years!
- The Evolution of PSR J0737-3039B and a Model for Relativistic Spin Precession
- Inclined Pulsar Magnetospheres in General Relativity: Polar Caps for the Dipole, Quadrudipole and Beyond
- On the beam properties of radio pulsars with interpulse emission
- X-ray Lightcurves from Realistic Polar Cap Models: Inclined Pulsar Magnetospheres and Multipole Fields
- Statistics of the individual-pulse polarization based on propagation effects in pulsar magnetosphere
- On the mean profiles of radio pulsars II: Reconstruction of complex pulsar light-curves and other new propagation effects
- Relativistic spin precession in the binary PSR J11416545
- Pulsar emission: Langmuir modes in a relativistic multi-component plasma