The evolution of isolated active regions
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The decay of several active regions which emerged early in cycle 22 has been studied using daily magnetograms and synoptic plots obtained at the Vacuum Telescope at the National Solar Observatory, Kitt Peak. The observed patterns are compared with simulations using the flux transport equation and some discrepancies are noted. For one region it is shown that, by including the emergence of a non-random pattern of small magnetic bipoles during the decay, the correspondence between the observed and simulated patterns may be improved.
KeywordsActive Region Transport Equation Solar Observatory Flux Transport Simulated Pattern
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- DeVore, C. R. and Sheeley, N. R., Jr.: 1987, Solar Phys. 108, 47.Google Scholar
- Fox, P., McIntosh, P. S., and Wilson, P. R.: 1998, Solar Phys. 177, 375.Google Scholar
- Leighton, R. B.: 1964, Astrophys. J. 146, 1547.Google Scholar
- Meyer, F., Schmidt, H. U., Weiss, N. O., andWilson, P. R.: 1974, Monthly Notices Royal Astron. Soc. 169, 35.Google Scholar
- Sheeley, N. R., Jr., Wang, Y.-M., and Harvey J. W.: 1989, Solar Phys. 119, 323.Google Scholar
- Snodgrass, H. B. and Wilson, P. R.: 1993, Solar Phys. 148, 179.Google Scholar
- Snodgrass, H. B., Kress, J. R., and Wilson, P. R.: 2000, Solar Phys.(to appear).Google Scholar
- Stenflo, J. O.: 1992, in K. Harvey (ed.), Proceedings of the National Solar Observatory/Sacramento Peak 12th Summer Workshop, San Francisco, CA, p. 63.Google Scholar
- Wang, Y.-M. and Sheeley, N. R., Jr.: 1991, Astrophys. J. 375, 681.Google Scholar
- Wang, Y.-M., Nash, A. G., and Sheeley, N. R., Jr.: 1989, Science 245, 681.Google Scholar
- Wilson, P. R. and Giovannis, J.: 1994, Solar Phys. 55, 29.Google Scholar