Abstract
From 20 K232-spectroheliograms, time and shape changes of the supergranular network were investigated by means of autocorrelation curves. It was found that supergranules are lengthened in the direction of the solar rotation and this flattening fades out with growing activity of the region. Dimensions of the supergranular network increase with the activity of the corresponding region. The average diameter of the supergranules in the inactive regions is larger in the maximum of the solar cycle than in its minimum. The contrast of the calcium emission with respect to the background is double in the solar maximum in comparison with that in the minimum.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bumba, V. and Howard, R.: 1965, Astrophys. J. 141, 1492.
Leighton, R. B.: 1964, Astrophys. J. 140, 1547.
Leighton, R. B., Noyes, R. W., and Simon, G. W.: 1962, Astrophys. J. 135, 474.
Simon, G. W. and Leighton, R. B.: 1964, Astrophys. J. 140, 1120.
Simon, G. W. and Weiss, N. O.: 1968, Z. Astrophys. 69, 435.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Sýkora, J. Time and shape changes of the supergranular network. Sol Phys 13, 292–300 (1970). https://doi.org/10.1007/BF00153550
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00153550