Formation of resonance doublet profiles in rapidly expanding envelopes

FINE STRUCTURE; SPECTRAL LINE WIDTH; STELLAR ENVELOPES; STELLAR RADIATION; STELLAR SPECTRA; EQUILIBRIUM EQUATIONS; OPTICAL THICKNESS; PARTICLE ACCELERATION; RADIATION DISTRIBUTION; RADIATIVE TRANSFER; RESONANCE; EARLY STARS

Abstract :

[en] 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.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Surdej, Jean ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)

Language :

English

Title :

Formation of resonance doublet profiles in rapidly expanding envelopes

Publication date :

1980

Journal title :

Astrophysics and Space Science

ISSN :

0004-640X

eISSN :

1572-946X

Publisher :

Springer Science & Business Media B.V., Dordrecht, Netherlands

Volume :

Pages :

101-158

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://esoads.eso.org/abs/1980Ap%26SS..73..101S

Commentary :

http://www.springerlink.com/content/t80888267w334225/

Available on ORBi :

since 13 September 2009

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