Wavelet-based Faraday rotation measure synthesisстатья

Статья опубликована в высокорейтинговом журнале

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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.

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[1] Wavelet-based faraday rotation measure synthesis / P. Frick, D. Sokoloff, R. Stepanov, R. Beck // Monthly Notices of the Royal Astronomical Society. — 2010. — Vol. 401. — P. 24. The Faraday rotation measure synthesis, as a method for analysing multichannel observations of polarized radio emission to investigate galactic magnetic field structures requires the definition of complex polarized intensity in the wavelength range -∞ < λ2 < ∞. The problem is that the measurements at negative λ2 are not possible. We introduce a simple method for continuation of the observed complex polarized intensity P(λ2) into the domain λ2 < 0 using symmetry arguments. The method is suggested in context of magnetic field recognition in galactic discs where the magnetic field is supposed to have a maximum in the equatorial plane. The method is quite simple when applied to a single Faraday rotating structure on the line of sight. Recognition of several structures on the same line of sight requires a more sophisticated technique. We also introduce a wavelet-based algorithm which allows us to consider a set of isolated structures in the (φ, λ2) plane (where φ is the Faraday depth). The method essentially improves the possibilities for reconstruction of complicated Faraday structures using the capabilities of modern radio telescopes. [ DOI ]

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