Physics
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986nascp2442..155h&link_type=abstract
In NASA. Goddard Space Flight Center Coronal and Prominence Plasmas p 155-167 (SEE N87-20871 13-92)
Physics
2
Frequency Distribution, H Lines, Solar Atmosphere, Solar Prominences, Solar Radiation, Solar Spectra, Sun, Plasmas (Physics), Solar Physics, Thermodynamics
Scientific paper
Departures from complete frequency redistribution (CRD) in hydrogen lines are investigated for solar prominences. Partial redistribution effects (PRD) are found both in the wings (their already known lowering) and in the central part of the L alpha line; a new feature is evidenced here: the partially coherent scattering in the near wings of the line leads to a double-peaked profile mirroring the incident solar radiation. With a low density model, we obtain a good agreement with OSO 8 observed profiles. On the contrary, the PRD computed L beta profile (lower density, no reversal) departs from the observed one, a result which calls for more progress in terms of non-LTE transfer and modelling.
Gouttebroze Pierre
Heinzel Petr
Vial Jean-Claude
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