Helicity detection of the astrophysical magnetic fields from radio emission statistics

Abstract

We discuss inverse problem of detection turbulence magnetic field helical properties using radio survey observations statistics. In this paper, we present principal solution which connects magnetic helicity and correlation between Faraday rotation measure and polarization degree of radio synchrotron emission. The effect of depolarization plays the main role in this problem and allows to detect magnetic helicity for certain frequency range of observable radio emission. We show that the proposed method is mainly sensitive to a large-scale magnetic field component.

arXiv comment5 pages, 6 figures

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• Magnetohydrodynamic experiments on cosmic magnetic fields
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Cited by in corpus (16)

• Galactic Dynamos
• The correct sense of Faraday rotation
• Practical Modeling of Large-Scale Galactic Magnetic Fields: Status and Prospects
• An observational test for correlations between cosmic rays and magnetic fields
• Probing magnetic helicity with synchrotron radiation and Faraday rotation
• Cosmological magnetic field correlators from blazar induced cascade
• Faraday signature of magnetic helicity from reduced depolarization
• Magnetic field tomography, helical magnetic fields and Faraday depolarization
• Imprints of magnetic power and helicity spectra on radio polarimetry statistics
• Current helicity and magnetic field anisotropy in solar active regions
• Helicity in the Large-Scale Galactic Magnetic Field
• A global two-scale helicity proxy from $\pi$-ambiguous solar magnetic fields
• Intergalactic medium rotation measure of primordial magnetic fields
• Compensating Faraday depolarization by magnetic helicity in the solar corona
• Stability of a self-gravitating homogeneous resistive plasma
• Hemispheric handedness in the Galactic synchrotron polarization foreground