The Unusual Minimum Preceding Cycle 24: What MHD Models Reveal

Details The Unusual Minimum Preceding Cycle 24: What MHD Models Reveal The Unusual Minimum Preceding Cycle 24: What MHD Models Reveal

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh23d..04l&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH23D-04

Astronomy and Astrophysics

Astrophysics

[2169] Interplanetary Physics / Solar Wind Sources, [7509] Solar Physics, Astrophysics, And Astronomy / Corona, [7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7536] Solar Physics, Astrophysics, And Astronomy / Solar Activity Cycle

Scientific paper

The mimimum preceding solar cycle 24 is characterized by unusual properties when compared with the previous cycle and other space age minima. These features include many more spotless days, weaker polar magnetic field strengths, weaker interplanetary magnetic fields, and persistent isolated equatorial coronal holes. We use high-resolution 3D MHD simulations of the corona to investigate coronal structure during the deep minimum. We compare these results with simulations of the corona for the minimum prior to solar cycle 23, to elucidate the differences between the minima. We will also discuss how the recent unusual minimum provides opportunities to test our understanding of the underlying processes that produce the corona and solar wind, particularly the origin of the slow solar wind. Research supported by NASA and NSF.

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