Approximate Lambda-Operators working at optimum convergence rate. I - Theory and application to hydrostatic atmospheres

Bibcode
1988A&A...204..219P
Puls, J.; Herrero, A.
Referencia bibliográfica

Astronomy and Astrophysics (ISSN 0004-6361), vol. 204, no. 1-2, Oct. 1988, p. 219-228.

Fecha de publicación:
10
1988
Número de autores
2
Número de autores del IAC
1
Número de citas
25
Número de citas referidas
24
Descripción
In this paper the approximate Lambda-Operator (ALO) developed by Olson, Auer and Buchler (OAB, 1986) is inspected from a more mathematical standpoint and compared to presently most commonly applied ALOs. For simple model calculations,it is shown that OAB's operator which contains no arbitrary parameter always works close to the optimum convergence rate. This operator is then applied for the first time to realistic NLTE calculations for hydrostatic atmospheres of hot stars, where it turns out that OAB's operator always leads to the fastest convergence rate and that this can be attained even for the most difficult case of nearly pure resonance scattering where other ALOs fail.
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Con árbitro
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