Helicity detection of the astrophysical magnetic fields from radio emission statistics

Details Helicity detection of the astrophysical magnetic fields from radio emission statistics Helicity detection of the astrophysical magnetic fields from radio emission statistics

2010-01-18

arxiv.org/abs/1001.2857v1

JETP Letters, 2009, V. 90, N. 10, pp. 637-641

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

5 pages, 6 figures

Scientific paper

10.1134/S0021364009220019

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.

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