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Title:
Granada oscillation code (GraCo)
Authors:
Moya, A.; Garrido, R.
Affiliation:
AA(Instituto de Astrofísica de Andalucía (CSIC)), AB(Instituto de Astrofísica de Andalucía (CSIC))
Publication:
Astrophysics and Space Science, Volume 316, Issue 1-4, pp. 129-133 (Ap&SS Homepage)
Publication Date:
08/2008
Origin:
SPRINGER
DOI:
10.1007/s10509-007-9694-2
Bibliographic Code:
2008Ap&SS.316..129M

Abstract

Granada oscillation code (GraCo) is a software constructed to compute adiabatic and non-adiabatic oscillation eigenfunctions and eigenvalues. The adiabatic version gives the standard numerical resolution, and also the Richardson extrapolation, different sets of eigenfunctions, different outer mechanical boundary conditions or different integration variables. The non-adiabatic version can include the atmosphere-pulsation interaction. The code has been used for intensive studies of δ Scuti, γ Doradus, β Ceph., SdO and, SdB stars. The non adiabatic observables “phase-lag” (the phase between the effective temperature variations and the radial displacement) and {δ T_{eff}over T_{eff}} (relative surface temperature variation) can help to the modal identification. These quantities together with the energy balance (“growth rate”) provide useful additional information to the adiabatic resolution (eigenfrequencies and eigenfunctions).
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