Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...459..307d&link_type=abstract
Astronomy and Astrophysics, Volume 459, Issue 1, November III 2006, pp.307-316
Astronomy and Astrophysics
Astrophysics
8
Atomic Data, X-Rays: Stars, Techniques: Spectroscopic
Scientific paper
Fe xviii produces, in the X-ray and extreme ultraviolet, L-shell (n=2,3,4 to 2) spectral lines which are among the brightest ones in e.g. solar flares and in Chandra, XMM-Newton spectra of active stars. Recent R-matrix scattering calculations of Witthoeft et al. (2006, A&A, 446, 361) produce theoretical intensities for some of the brightest transitions increased by large factors (2-3), so it is timely to use these calculations to review and assess all previous line identifications on a quantitative basis. This paper discusses only the most important lines for laboratory and astrophysical applications. Many previous identifications are revised and some tentative ones finally confirmed. Many lines are found to be significantly blended. A considerable number of new identifications are proposed. Excellent agreeement between observed and predicted intensities is found in the majority of cases for the first time. It is therefore now possible to use Fe xviii L-shell lines to measure electron densities in laboratory plasmas and temperatures for a wide range of astrophysical sources.
No associations
LandOfFree
Benchmarking atomic data for astrophysics: Fe xviii 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 Benchmarking atomic data for astrophysics: Fe xviii, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Benchmarking atomic data for astrophysics: Fe xviii will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1309932