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Effect of Continuum Scattering on the Statistical and Temporal Characteristics of Spectral Line Formation

Some new results from our study of the effect of continuum scattering on different observed characteristics of spectral lines are presented. The main purpose is to study temporal variations in line profiles and some statistical averages describing the diffusion of radiation in a medium. For simplicity the one dimensional problem of the formation of a spectral line of unit intensity in the continuum during reflection from a semi-infinite atmosphere is examined. The possibility of solving the steady-state problem analytically in the form of a Neumann series makes it possible to construct the corresponding solution of the nonstationary problem quite easily. Numerical calculations illustrate the differences in the evolution of the profiles and other characteristics between emission and absorption lines.

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Correspondence to A. G. Nikoghossian.

Additional information

Translated from Astrofizika, Vol. 64, No. 3, pp. 389-399, August 2021.

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Nikoghossian, A.G. Effect of Continuum Scattering on the Statistical and Temporal Characteristics of Spectral Line Formation. Astrophysics 64, 345–354 (2021).

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  • continuum scattering
  • Schuster mechanism
  • Erlang-n distribution
  • emission and absorption spectral lines