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Title:
Porto Oscillation Code ( posc)
Authors:
Monteiro, Mário J. P. F. G.
Affiliation:
AA(Centro de Astrofísica da Universidade do Porto; Departamento de Matemática Aplicada da Faculdade de Ciências, Universidade do Porto)
Publication:
Astrophysics and Space Science, Volume 316, Issue 1-4, pp. 121-127 (Ap&SS Homepage)
Publication Date:
08/2008
Origin:
SPRINGER
Keywords:
Stars: interiors, Stars: oscillations, Methods: numerical
DOI:
10.1007/s10509-008-9802-y
Bibliographic Code:
2008Ap&SS.316..121M

Abstract

The Porto Oscillation Code ( posc) has been developed in 1995 and improved over the years, with the main goal of calculating linear adiabatic oscillations for models of solar-type stars. It has also been used to estimate the frequencies and eigenfunctions of stars from the pre-main sequence up to the sub-giant phase, having a mass between 0.8 and 4 solar masses. The code solves the linearised perturbation equations of adiabatic pulsations for an equilibrium model using a second order numerical integration method. The possibility of using Richardson extrapolation is implemented. Several options for the surface boundary condition can be used. In this work we briefly review the key ingredients of the calculations, namely the equations, the numerical scheme and the output.
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