Solar Si XI line ratios observed by the normal incidence spectrometer on SOHOCDS

Citation
J. Lang et al., Solar Si XI line ratios observed by the normal incidence spectrometer on SOHOCDS, SOLAR PHYS, 201(1), 2001, pp. 37-56
Citations number
56
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
SOLAR PHYSICS
ISSN journal
0038-0938 → ACNP
Volume
201
Issue
1
Year of publication
2001
Pages
37 - 56
Database
ISI
SICI code
0038-0938(200106)201:1<37:SSXLRO>2.0.ZU;2-K
Abstract
New measurements of line intensity ratios in the Be-like ion Si xi are pres ented for observations of the quiet Sun, active regions, coronal holes and above-limb regions obtained using the Coronal Diagnostic Spectrometer on th e Solar and Heliospheric Observatory. A model ion, constructed using the be st available atomic data, is used to predict the line intensity ratios for a wide range of electron temperatures and densities. Comparisons of the the oretical ratios with the new intensity ratios as well as with those from pr evious solar observations and laboratory measurements are given. The useful ness of the ratios for electron temperature and density diagnostics, as wel l as for spectrometer calibration, is discussed.