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The height variation of granular and oscillatory velocities

✍ Scribed by Richard C. Canfield

Publisher
Springer
Year
1976
Tongue
English
Weight
774 KB
Volume
50
Category
Article
ISSN
0038-0938

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✦ Synopsis

Previous observations of spatially-resolved vertical velocity variations in ten lines of Fe I spanning the height range 0<h<1000 km are re-analyzed 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-~. 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 t. 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.

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