Demonstrating the limitations of line ratio temperature diagnostic using Fe X and Fe XIV spectral line intensity observations

Details Demonstrating the limitations of line ratio temperature diagnostic using Fe X and Fe XIV spectral line intensity observations Demonstrating the limitations of line ratio temperature diagnostic using Fe X and Fe XIV spectral line intensity observations

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995sowi.conf...69b&link_type=abstract

Harvard-Smithsonian Center for Astrophysics, International Solar Wind 8 Conference, p. 69

Astronomy and Astrophysics

Astrophysics

1

Coronas, Electron Energy, Iron Isotopes, Coronal Holes, Line Spectra, Mathematical Models, Solar Observatories, Solar Activity Effects

Scientific paper

The electron temperature in the inner corona can be derived from spectral line intensity measurements by comparing the ratio of the measured intensities of two spectral lines to the ratio calculated from theoretical models. In a homogeneous plasma the line ratio technique can be used for any two lines if the ratio of the intensities is independent of the density. The corona, however, is far from homogeneous. Even large coronal holes present at the solar poles at solar minimum can be partly or completely obscured by emission from hotter and denser surrounding regions. In this paper we investigate the effect of these surrounding regions on coronal hole temperatures. using daily intensity measurements at 1.15 Rs of the Fe XIV 5303 A and Fe X 6374 A spectral lines carried out at the National Solar Observatory at Sacramento Peak. We show that the temperatures derived using the line ratio technique for these two spectral lines can vary by more than 0.8 x 106 K due to the contribution from surrounding regions. This example demonstrates the inadequacy of spectral lines with widely separate peak temperatures for temperature diagnostic.

Affiliated with

Also associated with

No associations

Rating

Demonstrating the limitations of line ratio temperature diagnostic using Fe X and Fe XIV spectral line intensity observations 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 Demonstrating the limitations of line ratio temperature diagnostic using Fe X and Fe XIV spectral line intensity observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Demonstrating the limitations of line ratio temperature diagnostic using Fe X and Fe XIV spectral line intensity observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-759976