The global solar corona defined by newly emerged flux at low latitudes

Details The global solar corona defined by newly emerged flux at low latitudes The global solar corona defined by newly emerged flux at low latitudes

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sh41b05l&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SH41B-05

Physics

7509 Corona

Scientific paper

The global structure of the solar corona changes greatly from solar minimum to maximum. To understand the details of this restructuring, we analyzed the full disk Yohkoh/SXT images taken during the years 1996 to 1998. We found that the global coronal structures are largely defined by a handful of active regions which emerged at low latitudes in the first year of the new solar cycle following solar minimum. The rotation rates of the structures agree with photospheric differential rotation rate of their associated active region. Following the first year of the solar cycle, newly emerged flux tends to appear near the old flux, which may give the impression of the existence of an active longitude; however, the coronal structure is clearly associated in space and time with the new flux, not some average location.

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