Enhancement of optically thick to thin line intensities in solar and stellar coronal plasmas through radiative transfer effects: an angularly resolved study.

F.M. Kerr, S.J. Rose, J.S. Wark, Francis Keenan

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

An analysis of radiative transfer effects present in the Fe XV ion stage of solar and stellar coronal plasmas provides a general explanation of line radiation intensity enhancement above the optically thin limit. Full linearization radiation transfer is compared with the escape factor method and found to be in good agreement at the lower column densities. An angular study of the enhancement shows that symmetry factors are of great importance. This gives a possible reason for the indeterminate status of opacity in relation to coronal lines of distant stellar sources, where only emission integrated across the whole surface is detected.
Original languageEnglish
Pages (from-to)L181-L184
Number of pages4
JournalAstrophysical Journal
Volume613(2)
Issue number2 II
DOIs
Publication statusPublished - 01 Oct 2004

ASJC Scopus subject areas

  • Space and Planetary Science

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