Pole-equator-difference of the size of the chromospheric CA II-K-network in quiet and active solar regions

Details Pole-equator-difference of the size of the chromospheric CA II-K-network in quiet and active solar regions Pole-equator-difference of the size of the chromospheric CA II-K-network in quiet and active solar regions

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...213..431m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 213, no. 1-2, April 1989, p. 431-435. Research supported by the Austrian Minis

Astronomy and Astrophysics

Astrophysics

17

Calcium, Chromosphere, Filtergrams, Solar Activity, Fast Fourier Transformations, Image Processing, Power Spectra, Solar Rotation, Solar Spectra

Scientific paper

The dependence of the size of chromospheric network cells on latitude was investigated for quiet and active solar regions. Calibrated photographic Ca II K-filtergrams were used and a Fast Fourier Transform analysis was performed to obtain the cell size. Among other reductions the results had to be corrected for seeing effects. A significant decrease of the cell size toward higher latitudes and an increase with locally increasing magnetic activity was found.

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