Non-rigid rotation of solar spicules

Details Non-rigid rotation of solar spicules Non-rigid rotation of solar spicules

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994an....315..391p&link_type=abstract

Astronomische Nachrichten (ISSN 0004-6337), vol. 315, no. 5, p. 391-397

Astronomy and Astrophysics

Astronomy

3

Chromosphere, H Alpha Line, Solar Rotation, Spicules, Solar Atmosphere, Spectrum Analysis

Scientific paper

H-alpha profiles of chromospheric spicules computed for a variety of rotational behavior are compared with an observed profile, which was derived by averaging 11 H-alpha profiles taken near times of maximum spicule intensity. If turbulent velocity is small or equals zero, calculated profiles are in good agreement with the observed one under the conditions that rotation is non-rigid (faster rotation further away from the axis of the spicule) and the source function decreases in the direction from the spicule axis to the periphery. The comparison of calculated and observed tilts of spicule spectra relative to the direction of dispersion seems to corroborate the non-rigid character of spicular rotation.

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