Three-dimensional estimates of the coronal electron density at times of extreme solar activity

Details Three-dimensional estimates of the coronal electron density at times of extreme solar activity Three-dimensional estimates of the coronal electron density at times of extreme solar activity

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jgra..11009s09b&link_type=abstract

Journal of Geophysical Research, Volume 110, Issue A9, CiteID A09S09

Astronomy and Astrophysics

Astrophysics

4

Solar Physics, Astrophysics, And Astronomy: Corona, Solar Physics, Astrophysics, And Astronomy: Coronal Holes, Radio Science: Tomography And Imaging (7270, 8180), Solar Physics, Astrophysics, And Astronomy: Instruments And Techniques

Scientific paper

This paper presents quantitative three-dimensional (3-D) reconstructions of the electron density (Ne) in the solar corona between 1.14 and 2.7 solar radii (R$\odot$) formed from polarized brightness (pB) measurements made by the Mauna Loa Solar Observatory Mark-IV (Mk4) K-coronameter at the time of the extreme solar events of October and November 2003. The 3-D reconstructions are made by a process called solar rotational tomography that exploits the view angles provided by solar rotation during a 2-week period. Although this method is incapable of resolving dynamic evolution on timescales of less than about 2 weeks, a qualitative comparison of the reconstructions to instantaneous Extreme ultraviolet Imaging Telescope images (EIT) shows good agreement between coronal holes, active regions, and ``quiet Sun'' structures on the disk and their counterparts in the corona at 1.2 R$\odot$.

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