Formation of resonance doublet profiles in rapidly expanding envelopes

Details Formation of resonance doublet profiles in rapidly expanding envelopes Formation of resonance doublet profiles in rapidly expanding envelopes

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..73..101s&link_type=abstract

Astrophysics and Space Science, vol. 73, no. 1, Nov. 1980, p. 101-158.

Astronomy and Astrophysics

Astrophysics

9

Early Stars, Fine Structure, Spectral Line Width, Stellar Envelopes, Stellar Radiation, Stellar Spectra, Equilibrium Equations, Optical Thickness, Particle Acceleration, Radiation Distribution, Radiative Transfer, Resonance

Scientific paper

Sobolev's escape probability method is used to investigate the transfer of spectral line radiation for a resonance doublet in a rapidly expanding envelope. A three-level atom model is used to derive expressions for the spectral radiation fields J12 and J13, the resulting radiative force exerted per atom, and the resonance doublet profile for the cases of outward-accelerating (or equivalently inward-decelerating) and outward-decelerating (or equivalently inward-accelerating) envelopes. Criteria are deduced under which resonance doublet profiles formed in outward-accelerating and/or outward-decelerating envelopes would appear to be resolved into double P Cygni profiles.

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