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SUMMARY:!!! CANCELLED !!! On radiative transfer in stellar atmospheres
DTSTART;VALUE=DATE-TIME:20200318T160000Z
DTEND;VALUE=DATE-TIME:20200318T170000Z
DTSTAMP;VALUE=DATE-TIME:20200529T071334Z
UID:indico-event-358@cern.ch
DESCRIPTION:!!! CANCELLED !!!\n\nabstract:\n\nThe observed spectra of star
s are consisted of continuum and absorption spectral lines\, They are the
only source of information of the dynamical and structural properties of t
he stellar interiors. The spectral lines formed in the outer layers\, i.e.
the atmospheres\, are result of complex mutual interaction of the radiati
on field and the state of matter. Thus\, one of the central problems of th
e astrophysical spectroscopic diagnostics is the radiative transfer (RT) i
n the spectral lines. Its solution is performed by numerical calculations.
Due to the important role of scattering processes that relate distant poi
nts of the atmosphere via the radiation field\, the RT problem is non-loca
l. Additionally\, for the case of multi-level atoms\, the problem is non-l
inear\; the coupling of the atomic level populations (state of matter) and
the radiation field intensities in the corresponding line transitions has
to be performed by simultaneous solution of the two main sets of equation
s: RT and statistical equilibrium. The non-linearity of the problem requ
ires a use of some kind of iterative procedure. In the past few decades va
rious numerical methods have been developed\, using different approaches a
nd numerical techniques. Some will be presented here\, with emphasis on tw
o of them: the Iteration Factors Method (IFM) and Forth-and-Back Implicit
Lambda Iteration (FBILI).\n\nhttp://indico.smi.oeaw.ac.at/event/358/
LOCATION:SMI - Boltzmanngasse 3\, 1090 Wien Seminarraum
URL:http://indico.smi.oeaw.ac.at/event/358/
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