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

Mohan, A Dwivedi, BN Raju, PK

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

16

INGLESE

Article

Space Sciences

JOURNAL OF ASTROPHYSICS AND ASTRONOMY

0250-6335 → ACNP

20

1-2

1999

51 - 65

ISI

0250-6335(199906)20:1-2<51:DATDOS>2.0.ZU;2-A

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.