The effect of non-linear oscillations in magnetic flux tubes on Stokes V asymmetry

Details The effect of non-linear oscillations in magnetic flux tubes on Stokes V asymmetry The effect of non-linear oscillations in magnetic flux tubes on Stokes V asymmetry

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...249..239g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 249, no. 1, Sept. 1991, p. 239-242.

Astronomy and Astrophysics

Astrophysics

16

Line Spectra, Magnetic Field Configurations, Solar Magnetic Field, Solar Oscillations, Solar Spectra, Longitudinal Waves, Magnetic Flux, Solar Atmosphere, Spectrum Analysis

Scientific paper

The present knowledge on, and interpretation of, the asymmetry of Stokes V of spectral lines thought to be formed in and around magnetic flux tubes is reviewed. Crude models of nonlinear oscillations in the flux tube were investigated in order to explain the observed values of Stokes V amplitude and area asymmetry. It was found that flux tube models with quasi-oscillatory motions, consisting of a slow upflow and a rapid downflow in the magnetic region, as well as a downflow in the nonmagnetic surroundings, may reproduce the observations, both asymmetries and zero-crossing shift of Stokes V.

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