Granular-size horizontal velocities in the solar atmosphere

Details Granular-size horizontal velocities in the solar atmosphere Granular-size horizontal velocities in the solar atmosphere

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....96...96m&link_type=abstract

Astronomy and Astrophysics, vol. 96, no. 1-2, Mar. 1981, p. 96-101. Research supported by the Bundesministerium für Forschung u

Astronomy and Astrophysics

Astrophysics

21

Flow Velocity, Magnetohydrodynamic Flow, Photosphere, Solar Atmosphere, Solar Granulation, Balloon Flight, Line Spectra, Mean Square Values, Solar Limb

Scientific paper

Observations of horizontal motions in the granulation of the solar photosphere and the center-to-limb variations are reported. Measurements of the Fe I 5121.649, Cr I 5122.121 and Fe I 5123.730 lines were obtained by the balloon-borne spectro-stratoscope with slit direction tangential to the limb. Following correction for known instrumental effects, rms line velocities are found to increase towards the limb, and to contain a horizontal component approximately twice as large as the vertical component. The results are noted to be in agreement with those of Keil and Canfield (1978) at lower photospheric heights, and those of Beckers and Canfield (1975) at greater photospheric heights.

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