Publication Details:
Journal or Publication Title:
Աստղաֆիզիկա = Астрофизика = Astrophysics
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Title:
Nonlinear Radiative Transfer In Resonance Lines With Noncoherent Scattering
Other title:
Нелинейный перенос излучения в резонансных линиях с некогерентным рассеянием
Creator:
Contributor(s):
Գլխավոր խմբ․՝ Վ․ Հ․ Համբարձումյան (1965-1987) ; Լ․ Վ․ Միրզոյան (1988-1999) ; Դ․ Մ․ Սեդրակյան (2000-2017) ; Ա․ Գ․ Նիկողոսյան (2018-2024) ; Գ․ Տ․ Տեր-Ղազարյան (2025-)
Subject:
Uncontrolled Keywords:
transfer equation ; nonlinearity ; noncoherent scattering ; iteration ; convergence ; resonance lines
Coverage:
Abstract:
This paper addresses to the solving of the nonlinear radiative transfer equation in resonance lines under partial frequency redistribution. The existence of a constructive solution to the twodimensional integral equation is proven for the general case of nonlinearity with non-coherent scattering. Special attention is focused to different kinds of nonlinear dependencies of the source function on the mean intensity. Along with nonlinearity, we also separately consider the cases of coherent, complete, and general frequency redistribution. Based on the theoretical results, numerical simulations are implemented to demonstrate the qualitative and quantitative differences between the linear and nonlinear solutions. Numerical calculations are carried out for the different spectral lines arising in masers, as well as in solar and stellar chromospheres.
Place of publishing:
Երևան