Differential rotation and giant cell circulation of solar Ca/+/-network

Details Differential rotation and giant cell circulation of solar Ca/+/-network Differential rotation and giant cell circulation of solar Ca/+/-network

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...49...19s&link_type=abstract

Solar Physics, vol. 49, July 1976, p. 19-32. Deutsche Forschungsgemeinschaft

Physics

27

Angular Velocity, Atmospheric Circulation, Calcium, Solar Rotation, Velocity Measurement, Angular Momentum, Cations, Computer Techniques, Equators, Error Analysis, Histograms

Scientific paper

The paper reports results obtained from high-precision computer-controlled tracings of about 400 bright Ca(+) mottles made during the summer of 1975. In particular, the existence of a giant circulation pattern in the equatorial zone in 1975 is investigated. Solar angular velocity is determined as a function of latitude. Observations from April 26 to June 19 give strong evidence that, at the time, four giant circulation cells crossing the solar equator (i.e., a nonaxisymmetric velocity-field pattern with respect to the solar equator) did exist. This yields two more rapidly and two more slowly rotating sectors with a velocity difference of + or - 80 m/s. These giant cells transport angular momentum towards the equator.

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