Procyon-A and Eta-Bootis: Observational Frequencies Analyzed by the Local-Wave Formalism

Details Procyon-A and Eta-Bootis: Observational Frequencies Analyzed by the Local-Wave Formalism Procyon-A and Eta-Bootis: Observational Frequencies Analyzed by the Local-Wave Formalism

2006-08-30

arxiv.org/abs/astro-ph/0608652v1

Astronomy and Astrophysics

Astrophysics

SOHO 18 / GONG 2006 / HELAS I Meeting

Scientific paper

In the present analysis of Procyon-A and Eta-Bootis, we use the local-wave formalism which, despite its lack of precision inherent to any semi-analytical method, uses directly the model profile without any modification when calculating the acoustic mode eigenfrequencies. These two solar-like stars present steep variations toward the center due to the convective core stratification, and toward the surface due to the very thin convective zone. Based on different boundary conditions, the frequencies obtained with this formalism are different from that of the classical numerical calculation. We point out that (1) the frequencies calculated with the local-wave formalism seem to agree better with observational ones. All the frequencies detected with a good confident level including those classified as 'noise' find an identification, (2) some frequencies can be clearly identified here as indications of the core limit.

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