Spectroscopic diagnostics for ions observed in solar and cosmic plasmas
Abstract
The X-ray wavelength region (1-200 A) is rich in spectral lines from highly ionized systems. Spectra from the solar atmosphere have been studied extensively with various instruments covering different wavelength regions. The solar spectral line emission with particular reference to iron ions and helium-like ions observed during solar flares is discussed. The atomic processes involved in the calculation of theoretical intensities for low-density plasmas are outlined together with the diagnostic properties of the emission lines. Comparisons are made with available cosmic X-ray spectra and predicted spectra for future projects, such as AXAF.
- Publication:
-
IAU Colloq. 115: High Resolution X-ray Spectroscopy of Cosmic Plasmas
- Pub Date:
- 1990
- Bibcode:
- 1990hrxr.conf...11M
- Keywords:
-
- Cosmic Plasma;
- Line Spectra;
- Solar Atmosphere;
- Solar Flares;
- Solar Spectra;
- X Ray Spectroscopy;
- Emission Spectra;
- Emissivity;
- Helium;
- Iron;
- Solar Corona;
- X Ray Astronomy;
- Solar Physics