Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.3504h&link_type=abstract
American Astronomical Society, SPD meeting #40, #35.04; Bulletin of the American Astronomical Society, Vol. 41, p.868
Astronomy and Astrophysics
Astronomy
Scientific paper
We present recent progress in the calculation of the solar coronal spectrum in spherical symmetry, which allows us to correctly account for the contribution of the extended corona to the irradiance spectrum. With the Solar Radiation Physical Modeling (SRPM) system we solve the full NLTE for the most abundant elements from H to Fe up to ion charge 2. For higher ionization states the statistical equation is solved in the optically thin approach. Presently, a total number of 14,000 atomic levels and 170,000 spectral lines are included. The calculations are based on 1D atmosphere structures for the chromosphere and transition region for different solar surface features and various coronal temperature structures for coronal features such as coronal holes, the quiet and active corona. The results are compared with the SOHO/EIT observations and the spectrum taken with the EVE rocket instrument on April 14, 2008. These results are important for the interpretation of the observations taken with the EVE instrument on board the Solar Dynamics Observatory (SDO) expected to launch this year.
Fontenla Juan
Haberreiter Margit
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