Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.344..157s&link_type=abstract
In ESA, Solar Physics and Astrophysics at Interferometric Resolution p 157-159 (SEE N93-10901 01-90)
Astronomy and Astrophysics
Astrophysics
Convection, Fabry-Perot Interferometers, High Resolution, Photosphere, Solar Granulation, Stellar Spectrophotometry, Autocorrelation, Cross Correlation, Solar Wind Velocity
Scientific paper
Recent studies showed that in solar granulation, granules sizes lower than 3 inches may be considered as turbulent eddies. However, this result is in contradiction with morphological studies carried out by other authors. The spatial domain, the autocorrelation, and crosscorrelation functions of the velocity and of the intensity fields at several depths in the solar atmosphere are analyzed using narrow band filtergrams obtained by vacuum tower telescope with a Universal Birefringent Filter (UBF) and a Fabry-Perot (FP) interferometer mounted in tandem. The results show that the granular motion is turbulent for heights larger than 170 km while at lower heights is convective.
Bertello Luca
Bonaccini Domenico
Cavallini Fabio
Ceppatelli Guido
Righini Alberto
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