A comparison between theoretical and solar FeXII UV line intensity ratios UV line intensity ratios
Abstract
A new set of radiative and electron collisional data for Fe XII was presented in two earlier papers. In the present work, we derive level populations and theoretical line intensities for a range of plasma densities and temperatures. Observations of Fe XII lines obtained with the Solar EUV Rocket Telescope and Spectrograph are analysed both as a check the quality of the new atomic data and to determine the electron density in active regions and the quiet Sun. The discrepancy between the electron density values determined from Fexii line intensity ratios and those obtained from other ions is investigated. Tables 2-5 are also available in electronic form at the CDS via anonymous ftp to cdarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/370/1071}
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 2001
- DOI:
- 10.1051/0004-6361:20010255
- Bibcode:
- 2001A&A...370.1071B
- Keywords:
-
- SUN: GENERAL;
- ATOMIC DATA;
- UV SUN: RADIATIONS;
- PLASMAS