An Analytic Geometry-variant Approach to Line Ratio Enhancement above the Optically Thin Limit

Details An Analytic Geometry-variant Approach to Line Ratio Enhancement above the Optically Thin Limit An Analytic Geometry-variant Approach to Line Ratio Enhancement above the Optically Thin Limit

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...629.1091k&link_type=abstract

The Astrophysical Journal, Volume 629, Issue 2, pp. 1091-1101.

Astronomy and Astrophysics

Astronomy

5

Methods: Analytical, Radiative Transfer, Stars: Coronae, Sun: Uv Radiation, X-Rays: General

Scientific paper

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.

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