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Hemispheric Asymmetries of Solar Photospheric Magnetism: Radiative, Particulate, and Heliospheric Impacts by McIntosh, Scott W.; Leamon, Robert J.; Gurman, Joseph B.; Olive, Jean-Philippe; Cirtain, Jonathan W.; Hathaway, David H.; Burkepile, Joan; Miesch, Mark; Markel, Robert S.; Sitongia, Leonard is a scholarly article available to read on EtoBox.

What is Hemispheric Asymmetries of Solar Photospheric Magnetism: Radiative, Particulate, and Heliospheric Impacts about?

Among many other measurable quantities the summer of 2009 saw a considerable low in the radiative output of the Sun that was temporally coincident with the largest cosmic ray flux ever measured at 1AU. A hemispheric asymmetry in magnetic activity is clearly observed and its evolution monitored and the resulting (prolonged) magnetic imbalance must have had a considerable impact on the structure and energetics of the heliosphere. While we cannot uniquely tie the variance and scale of the surface magnetism to the dwindling radiative and particulate output of the star, or the increased cosmic ray flux through the 2009 minimum, the timing of the decline and rapid recovery in early 2010 would appear to inextricably link them. These observations support a picture where the Sun's hemispheres are significantly out of phase with each other. Studying historical sunspot records with this picture in mind shows that the northern hemisphere has been leading since the middle of the last century and that the hemispheric "dominance" has changed twice in the past 130 years. The observations presented give clear cause for concern, especially with respect to our present understanding of the processes t

Author

McIntosh, Scott W.; Leamon, Robert J.; Gurman, Joseph B.; Olive, Jean-Philippe; Cirtain, Jonathan W.; Hathaway, David H.; Burkepile, Joan; Miesch, Mark; Markel, Robert S.; Sitongia, Leonard

Published

2013

Language

EN