Abstract
We describe a simple theoretical model to investigate the anomalous effects of opacity on spectral line ratios, as previously studied in elements such as Fe XV and Fe XVII. The model developed is general: it is not specific to a particular atomic system, thus giving applicability to a number of coronal and chromospheric plasmas; furthermore, it may be applied to a variety of astrophysically relevant geometries. The analysis is underpinned by geometrical arguments, and we outline a technique for it to be used as a tool for the explicit diagnosis of plasma geometry in distant astrophysical objects.
Original language | English |
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Pages (from-to) | 1091-1101 |
Number of pages | 11 |
Journal | Astrophysical Journal |
Volume | 629 |
Issue number | 2 I |
Publication status | Published - 20 Aug 2005 |
ASJC Scopus subject areas
- Space and Planetary Science