The standard line-formation problem - Second-order approximations including continuous absorption

Details The standard line-formation problem - Second-order approximations including continuous absorption The standard line-formation problem - Second-order approximations including continuous absorption

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pazh...10..554s&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 10, July 1984, p. 554-560) Soviet Astronomy Letters (ISSN 0360-0327), vol. 10, July-Aug

Other

Astronomical Spectroscopy, Atmospheric Attenuation, Continuous Radiation, Electromagnetic Absorption, Line Spectra, Approximation, Functions (Mathematics), Integral Equations, Isothermal Processes, Photoabsorption

Scientific paper

Simple approximations to the source function for a spectral line that allow for continuous absorption are proposed for the standard line-formation problem (two-level atom, complete frequency redistribution, plane-parallel atmosphere). For parameters having values of astrophysical interest, the corresponding approximate source functions differ from the exact functions by less than a factor 2.

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