Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh33a2029a&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SH33A-2029
Astronomy and Astrophysics
Astrophysics
[7509] Solar Physics, Astrophysics, And Astronomy / Corona, [7536] Solar Physics, Astrophysics, And Astronomy / Solar Activity Cycle
Scientific paper
Solar Cycle 24 had a weak start following an extraordinarily long minimum. Observations of the Fe XIV corona from the Sacramento Peak site of the National Solar Observatory showed an abnormal pattern of emission compared to observations of Cycles 21, 22, and 23 from the same instrument. The previous three cycles had a strong, rapid "Rush to the Poles" in Fe XIV. Cycle 24 displays a delayed, weak, intermittent, and slow "Rush" that is mainly apparent in the northern hemisphere. This paper discusses (i) the characteristics of emission from Fe XIV and other coronal ions and (ii) the coronal temperature calculated from the NSO observations in order to further characterize coronal conditions during this epoch and their implications for Cycle 24 maximum.
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