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Resonance line transfer calculations by doubling thin layers. I - Comparison with other techniques. II - The use of the R-parallel redistribution function

1989; IOP Publishing; Volume: 346; Linguagem: Inglês

10.1086/168029

1538-4357

R. V. Yelle, Lloyd Wallace,

Electron Spin Resonance Studies

view Abstract Citations (12) References (16) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Resonance Line Transfer Calculations by Doubling Thin Layers. I. Comparison with Other Techniques Yelle, Roger V. ; Wallace, Lloyd Abstract A versatile and efficient technique for the solution of the resonance line scattering problem with frequency redistribution in planetary atmospheres is introduced. Similar to the doubling approach commonly used in monochromatic scattering problems, the technique has been extended to include the frequency dependence of the radiation field. Methods for solving problems with external or internal sources and coupled spectral lines are presented, along with comparison of some sample calculations with results from Monte Carlo and Feautrier techniques. The doubling technique has also been applied to the solution of resonance line scattering problems where the R-parallel redistribution function is appropriate, both neglecting and including polarization as developed by Yelle and Wallace (1989). With the constraint that the atmosphere is illuminated from the zenith, the only difficulty of consequence is that of performing precise frequency integrations over the line profiles. With that problem solved, it is no longer necessary to use the Monte Carlo method to solve this class of problem. Publication: The Astrophysical Journal Pub Date: November 1989 DOI: 10.1086/168029 Bibcode: 1989ApJ...346..481Y Keywords: Atmospheric Scattering; Planetary Atmospheres; Radiative Transfer; Resonance Lines; Frequency Distribution; Isothermal Processes; Isotropic Media; Monte Carlo Method; Optical Thickness; Polarization Characteristics; Lunar and Planetary Exploration; ANALYTICAL METHODS; LINE FORMATION; PLANETS: ATMOSPHERES; RADIATIVE TRANSFER full text sources ADS | Related Materials (1) Part 2: 1989ApJ...346..489W