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Title: Study of calcium-K network evolution from Antarctica
Authors: Singh, J
Nagabhushana, B. S
Babu, G. S. D
Uddin, Wahab
Keywords: Antarctic Regions;Calcium;Chromosphere;K Lines;Solar Activity;Solar Granulation;Solar Magnetic Field;Cameras;Data Correlation;Filtergrams;Frequency Distribution;H Alpha Line;Heliostats;Telescopes
Issue Date: Aug-1994
Publisher: Springer
Citation: Solar Physics, Vol. 153, No. 1-2, pp. 157 - 167
Abstract: To study the evolution of large convective cells known as supergranules, a solar telescope was set up at Maitri, Indian permanent station in Antarctica region, during the local summer months (December 1989 through March 1990). A continuous sequence of calcium K-line filtergrams for 106 hours spaced at intervals of about 10 min was obtained. The analysis of the data indicates that the most probable lifetime of the calcium-K network is about 22 hours. The lifetime depends upon the size of the cell and is larger for bigger cells. The data also show that cells (of a given size) associated with remnant magnetic field regions live longer than those in the field-free region. This may mean that the magnetic field plays an important role in the confinement of these structures.
ISSN: 0038-0938
Appears in Collections:IIAP Publications

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