The height variation of granular and oscillatory velocities.
Abstract
Previous observations of spatiallyresolved vertical velocity variations in ten lines of Fe I spanning the height range 0 ≲ h ≲ 1000 km are reanalyzed using velocity weighting functions. The amplitudes and scale heights of granular and oscillatory velocities are determined, as well as those of the remaining unresolved velocities. I find that the optimal representation of the amplitude of the outwarddecreasing granular velocities is an exponentially decreasing function of height, with a scale height of 150 km and a velocity at zero height of 1.27 km s^{−1}. The optimal representation of the same quantities for oscillatory velocities is an exponential increase with height, with a scale height of 1100 km and a velocity at zero height of 0.35 km s^{−1}. The remaining unresolved velocities decrease with height, with a scale height of 380 km and a velocity at zero height of 2.3 km s^{−1}.
 Publication:

Solar Physics
 Pub Date:
 November 1976
 DOI:
 10.1007/BF00155287
 Bibcode:
 1976SoPh...50..239C
 Keywords:

 Line Spectra;
 Photosphere;
 Solar Atmosphere;
 Solar Granulation;
 Solar Spectra;
 Velocity Distribution;
 Chromosphere;
 Iron;
 Perturbation Theory;
 Spectrum Analysis;
 Vertical Distribution;
 Weighting Functions;
 Solar Physics;
 Weighting Function;
 Vertical Velocity;
 Optimal Representation;
 Velocity Variation;
 Exponential Increase