Slow and Fast Rotating Coronal Holes from Geomagnetic Indices

Details Slow and Fast Rotating Coronal Holes from Geomagnetic Indices Slow and Fast Rotating Coronal Holes from Geomagnetic Indices

Sep 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010soph..266..159s&link_type=abstract

Solar Physics, Volume 266, Issue 1, pp.159-171

Physics

1

Scientific paper

The evolution of the 27-day recurrence in the series of two solar indices (Wolf number WN and 10.7 cm radio flux F) and two geomagnetic indices ( Dst and ζ, variance of the geomagnetic field recorded at a magnetic observatory) have been studied over the 1957 - 2007 time span. Spectral energies contained in two period domains (25 - 27.3 and 27.3 - 31 days), designated as E 1 and E 2, have been computed. Whereas the evolution of E 1 is the same for the four indices, that of E 2 is essentially different for WN and F on the one hand, Dst and ζ on the other hand. Some general conclusions on the dynamics of the solar outer layers are inferred from these results. First the solar activity, as measured by WN, and when averaged over a few years, evolves in the same way whatever the latitude. Second, two families of coronal holes (CHs) are identified; the rapidly and the slowly rotating CHs evolve quite differently.

Affiliated with

Also associated with

No associations

Rating

Slow and Fast Rotating Coronal Holes from Geomagnetic Indices does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Slow and Fast Rotating Coronal Holes from Geomagnetic Indices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slow and Fast Rotating Coronal Holes from Geomagnetic Indices will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1374960