Identifying the Distinctive Plasma Properties of Coronal Holes

Details Identifying the Distinctive Plasma Properties of Coronal Holes Identifying the Distinctive Plasma Properties of Coronal Holes

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsp31d..08h&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SP31D-08

Physics

7509 Corona, 7511 Coronal Holes, 7524 Magnetic Fields

Scientific paper

Interest in defining the distinguishing properties of coronal holes has been ongoing for several decades, due in large part to the prevailing view that they are the main source of the fast solar wind. So far, their main distinct signature on the solar disk is reduced absorption in the chromospheric He I 1083 nm line, and significantly reduced emission in EUV emission lines formed at, or above, a temperature of a million degrees. In this study, MDI line of sight photospheric magnetic field measurements are combined with EIT solar disk intensities of the EUV lines of Fe X 171 and Fe XII 195 A to define the boundaries of coronal holes, following the technique recently described by Scholl and Habbal (2007). By complementing this identification with coordinated SUMER Ne VIII intensity and Doppler measurements, it is shown that coronal holes, for the most part, are not the sole regions of outflow on the solar surface. While these results provide a new step in identifying coronal holes, they show that no single criterion can be used to distinguish a number of their plasma properties from those of the surrounding quiet Sun. Their underlying origin remains for the most part a puzzle.

Affiliated with

Also associated with

No associations

Rating

Identifying the Distinctive Plasma Properties of Coronal Holes 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 Identifying the Distinctive Plasma Properties of Coronal Holes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Identifying the Distinctive Plasma Properties of Coronal Holes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1402524