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The Extended Solar Cycle Tracked High into the Corona View all abstracts by submitter

Richard Altrock   Submitted: 2012-09-12 10:55

We present observations of the extended solar cycle activity in white-light coronagraphs, and compare them with the more familiar features seen in the Fe XIV green-line corona. We show that the coronal activity zones seen in the emission corona can be tracked high into the corona. The peak latitude of the activity, which occurs near solar maximum, is found to be very similar at all heights. But we find that the equatorward drift of the activity zones is faster at greater heights, and that during the declining phase of the solar cycle, the lower branch of activity (that associated with the current cycle) disappears at about 3 R o. This implies that that during the declining phase of the cycle, the solar wind detected near Earth is likely to be dominated by the next cycle. The so-called ?rush to the poles? is also seen in the higher corona. In the higher corona it is found to start at a similar time but at lower latitudes than in the green-line corona. The structure is found to be similar to that of the equatorward drift.

Authors: S. J. Tappin, R. C. Altrock
Projects: National Solar Observatory (Sac Peak)

Publication Status: accepted for publication in Solar Physics
Last Modified: 2012-09-13 10:54
Go to main E-Print page  Can solar wind viscous drag account for CME deceleration?  Magnetic Flux of EUV Arcade and Dimming Regions as a Relevant Parameter    for Early Diagnostics of Solar Eruptions - Sources of Non-Recurrent    Geomagnetic Storms and Forbush Decreases  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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