Density and temperature diagnostics of solar emission lines from NeV/MgV and SiVII/MgVII ions

Citation
A. Mohan et al., Density and temperature diagnostics of solar emission lines from NeV/MgV and SiVII/MgVII ions, J ASTROPHYS, 20(1-2), 1999, pp. 51-65
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
JOURNAL OF ASTROPHYSICS AND ASTRONOMY
ISSN journal
0250-6335 → ACNP
Volume
20
Issue
1-2
Year of publication
1999
Pages
51 - 65
Database
ISI
SICI code
0250-6335(199906)20:1-2<51:DATDOS>2.0.ZU;2-A
Abstract
We present NeV/MgV and SiVII/MgVII theoretical line intensity ratios as a f unction of electron density N-e and temperature T-e. These are shown in the form of ratio-ratio diagrams, which should in principle allow both N-e and T-e to be deduced for the emitting region of the solar plasma. We apply th ese diagnostics in the solar atmosphere, and discuss the available observat ions made from space. Zn most cases, however, we deduce N-e and T-e from th e computed absolute line intensities in a spherically symmetric model atmos phere of the Sun. Possible future applications of this investigation to spe ctral data from the Coronal Diagnostic Spectrometer (CDS) on the Solar and Heliospheric Observatory (SOHO) are briefly discussed.