Abstract
A new ‘crossing’ method for the study of turbulent velocities in solar and stellar photospheres is considered. The method does not need knowledge of the abundance and oscillator strengths for determining the microturbulent velocity, if the macroturbulent velocity is adopted; or it allows investigation of the micro- and macro-velocities simultaneously, if the abundance and oscillator strengths are known. Using the crossing method for 200 lines of neutral iron we obtain microturbulent velocities for a large range of depths in the solar photosphere. The distribution of macroturbulent velocities with depth is also investigated. The total velocity field calculated from the obtained micro- and macro-velocities agrees with previous results from independent methods. This demonstrates the reliability of using the crossing method for separate determination of the micro- and macroturbulent velocities in solar and stellar atmospheres.
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Gurtovenko, E.A., Sheminova, V.A. ‘Crossing’ method for studying the turbulence in solar and stellar atmospheres. Sol Phys 106, 237–247 (1986). https://doi.org/10.1007/BF00158494
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DOI: https://doi.org/10.1007/BF00158494