Radiative modeling of solar prominences, two-dimensional transfer plus partial frequency redistribution

Details Radiative modeling of solar prominences, two-dimensional transfer plus partial frequency redistribution Radiative modeling of solar prominences, two-dimensional transfer plus partial frequency redistribution

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.348..225p&link_type=abstract

In ESA, Proceedings of the First SOHO Workshop: Coronal Streamers, Coronal Loops, and Coronal and Solar Wind Composition p 225-2

Statistics

Computation

Frequency Distribution, Mathematical Models, Radiative Transfer, Solar Prominences, Computer Programs, Soho Mission, Solar Corona, Solar Radiation

Scientific paper

The two dimensional (2D) PRD (Partial Redistribution) radiative transfer code of Auer and Paletou was used to compute the resonance lines of HI, MgII and CaII in quiescent prominences, which are modeled as isothermal freestanding slabs illuminated from the sides as well as from below. PRD and 2D effects are evidenced and compared to Complete Redistribution (CRD) computations for both 1D and 2D geometries. Important edge variations are found at the bottom and the top that should be observed with a spatial resolution of one arcsecond. As in 1D, PRD effects allow for greater penetration of the incident radiation into the layer. The 2D code computes both the radial emergent intensity and the amount of radiation backscattered into the chromosphere. It can accordingly, be used to estimate the visibility of filaments. It will be of special interest to build nonisothermal models and compare, for example the Ly alpha profiles with the SUMER/SOHO (Solar Ultraviolet Measurement of Emitted Radiation)/(Solar and Heliospheric Observatory) observations.

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