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- W3103399872 abstract "Context: The presence of a turbulent magnetic field in the quiet Sun has been unveiled observationally using different techniques. The magnetic field is quasi-isotropic and has field strengths weaker than 100G. It is pervasive and may host a local dynamo. Aims: We aim to determine the length scale of the turbulent magnetic field in the quiet Sun. Methods: The Stokes V area asymmetry is sensitive to minute variations in the magnetic topology along the line of sight. Using data provided by Hinode-SOT/SP instrument, we performed a statistical study of this quantity.We classified the different magnetic regimes and infer properties of the turbulent magnetic regime. In particular we measured the correlation length associated to these fields for the first time. Results: The histograms of Stokes V area asymmetries reveal three different regimes: one organized, quasi-vertical and strong field (flux tubes or other structures of the like); a strongly asymmetric group of profiles found around field concentrations; and a turbulent isotropic field. For the last, we confirm its isotropy and measure correlation lengths from hundreds of kilometers down to 10km, at which point we lost sensitivity. A crude attempt to measure the power spectra of these turbulent fields is made. Conclusions: In addition to confirming the existence of a turbulent field in the quiet Sun, we give further prove of its isotropy.We also measure correlation lengths down to 10km. The combined results show magnetic fields with a large span of length scales, as expected from a turbulent cascade." @default.
- W3103399872 created "2020-11-23" @default.
- W3103399872 creator A5005084559 @default.
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- W3103399872 date "2012-03-27" @default.
- W3103399872 modified "2023-10-12" @default.
- W3103399872 title "Scales of the magnetic fields in the quiet Sun" @default.
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- W3103399872 doi "https://doi.org/10.1051/0004-6361/201118191" @default.
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