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Asymptotic Description and the Diagnostic Properties of Low-Degree Stellar P-Modes

Published online by Cambridge University Press:  08 February 2017

I.W. Roxburgh
Affiliation:
Astronomy Unit, Queen Mary and Westfield College, Mile End Road, London E1 4NS, UK
S.V. Vorontsov
Affiliation:
Astronomy Unit, Queen Mary and Westfield College, Mile End Road, London E1 4NS, UK Institute of Physics of the Earth, B. Gruzinskaya 10, Moscow 123810, Russia

Abstract

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Standard asymptotic descriptions of stellar p-modes use 1/ω as a small parameter; either the degree ℓ is kept constant in the asymptotic expansions (e.g. Tassoul 1980), or the parameter , which specifies the position of the inner turning point (e.g. Vorontsov 1991). At low degree, due to the strong effects of gravity perturbations, these expansions are known to produce rather poor results, even when developed to higher order (Roxburgh and Vorontsov 1994). Here, we employ an alternative asymptotic expansion, capable of providing much better accuracy at low degree-with as a small parameter instead of 1/ω, and test its diagnostic capabilities.

Type
VI. Asteroseismology II
Copyright
Copyright © Kluwer 1998 

References

Tassoul, M. (1980), ApJS 43, p.469 CrossRefGoogle Scholar
Roxburgh, I. W. and Vorontsov, S. V. (1994), Mon. Not. R. astr. Soc. 268, p.143 Google Scholar
Vorontsov, S. V. (1991), SvA 35, p.400 Google Scholar