Searching for mesogranulation - problems and possible methods.
Abstract
A time series of 8.5 hours with 1500 images of the solar granulation is investigated in this study. By various methods, such as feature tracking, LCT, and pattern recognition the authors try to find the mesogranulation. The divergence of the velocity fields calculated by LCT methods shows the mesogranular pattern after about 1.5 hours and, after a longer integration time (5 to 6 hours), also the supergranular pattern. Cork plots, i.e. small points, driven by the velocity vectors, show the same behaviour. Following the granules shows that they are moving toward regions looking like a network of 10 arcsec in size, which could be seen as the inter-mesogranular regions. The pattern recognition method does not show any correlation with the other methods.
- Publication:
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JOSO Annu. Rep., 1998
- Pub Date:
- 1999
- Bibcode:
- 1999joso.proc..145M
- Keywords:
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- Solar Granulation;
- Solar Photosphere: Structure