Electron density and temperature measurements, and abundance anomalies in the solar atmosphere |
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Authors: | Anita Mohan Bhola N Dwivedi Enrico Landi |
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Institution: | (1) Department of Applied Physics, Institute of Technology Banaras Hindu University, 221005 Varanasi, India;(2) Max-Planck-InstitutfürAeronomie, 37191 Katlenburg-Lindau, Germany |
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Abstract: | Using spectra obtained from the SUMER (Solar Ultraviolet Measurements of Emitted Radiation) spectrograph on the spacecraft
SOHO (Solar and Heliospheric Observatory), we investigate the height dependence of electron density, temperature and abundance
anomalies in the solar atmosphere. In particular, we present the behaviour of the solar FIP effect (the abundance enhancement
of elements with first ionization potential < 10 eV in the corona with respect to photospheric values) with height
above an active region observed at the solar limb, with emphasis on the so-called transition region lines. |
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Keywords: | Solar atmosphere abundance anomalies EUV diagnostics emission lines |
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