Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...319..683m&link_type=abstract
Astronomy and Astrophysics, v.319, p.683-693
Astronomy and Astrophysics
Astrophysics
10
Sun: Faculae, Sun: Magnetic Fields, Sun: Rotation, Sunspots, Turbulence
Scientific paper
We investigated the meridional circulation of photospheric faculae throughout cycle 19. Together with the rotation observed in a companion paper (Meunier et al. 1997A&A...319..673M), we were able to address the problem of the existence of the observed differential rotation. The meridional circulation is characterized by a strong north-south asymmetry. The distribution of meridional circulation around the mean value confirms the existence of two populations detected in Meunier et al. (1997A&A...319..673M). An investigation of the rms velocities yields information on the variation of the anisotropy between the two horizontal motions and the latitudinal dependence of the small-scale kinetic energy. Lastly, a very small facula covariance has been measured, and its variation during the cycle has been established.
Collin Bertrand
Meunier Nicolas
Nesme-Ribes Elizabeth
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