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

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      https://www.ias.ac.in/article/fulltext/joaa/020/01-02/0051-0065

    • Keywords

       

      Solar atmosphere; EUV diagnostics; emission lines; spectroscopic diagnostics

    • Abstract

       

      We present NeV/MgV and SiVII/MgVII theoretical line intensity ratios as a function of electron densityNe and temperatureTe. These are shown in the form of ratio-ratio diagrams, which should in principle allow bothNe andTe to be deduced for the emitting region of the solar plasma. We apply these diagnostics in the solar atmosphere, and discuss the available observations made from space. In most cases, however, we deduceNe andTe from the computed absolute line intensities in a spherically symmetric model atmosphere of the Sun. Possible future applications of this investigation to spectral data from the Coronal Diagnostic Spectrometer (CDS) on the Solar and Heliospheric Observatory (SOHO) are briefly discussed.

    • Author Affiliations

       

      Anita Mohan1 B. N. Dwivedi1 P. K. Raju2

      1. Department of Applied Physics, Institute of Technology, Banaras Hindu University, Varanasi - 221 005, India
      2. Indian Institute of Astrophysics, Bangalore - 560 034, India
    • Dates

       
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