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Restoration of the Atmosphere in Solar Models

Published online by Cambridge University Press:  12 April 2016

P. Morel ,
C. Van’t Veer ,
G. Berthomieu ,
R. Cayrel ,
F. Castelli ,
M.J. Goupil ,
Y. Lebreton  and
J. Provost
P. Morel
Affiliation:
Cassini, URA CNRS 1362, Observatoire de la Côte d’Azur, Nice
C. Van’t Veer
Affiliation:
DASGAL, URA CNRS 335, Observatoire de Paris, Paris
G. Berthomieu
Affiliation:
Cassini, URA CNRS 1362, Observatoire de la Côte d’Azur, Nice
R. Cayrel
Affiliation:
DASGAL, URA CNRS 335, Observatoire de Paris, Paris
F. Castelli
Affiliation:
Observatorio Astronomico, Trieste
M.J. Goupil
Affiliation:
DASGAL, URA CNRS 335, Observatoire de Paris, Paris
Y. Lebreton
Affiliation:
DASGAL, URA CNRS 335, Observatoire de Paris, Paris
J. Provost
Affiliation:
Cassini, URA CNRS 1362, Observatoire de la Côte d’Azur, Nice

Abstract

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From models of the Sun atmosphere obtained with ATLAS 9 (Kurucz 1992) it appears that the diffusion limit of the transfer equation becomes valid only at depths larger than TR ~ 10. Even with physics as consistent as possible one restores the atmosphere with an accuracy not better than ~ 40%, but with small consequences on solar calibrated models. Despite the eigenmodes have turning points located in the atmosphere, the study of the oscillations reveals differences less than 2μHz when the atmosphere is restored with various assumptions.

Type
I. Setting the stage: Sun, Stars Galaxies and the Universe
Information
International Astronomical Union Colloquium , Volume 137: Inside the Stars , 1993 , pp. 57 - 59
Copyright
Copyright © Astronomical Society of the Pacific 1993

References

Ando, H., Osaki, Y. 1975, P.A.S.J., 27, 581 Google Scholar
Kurucz, R.L. 1992, private communicationGoogle Scholar
Mihalas, D. 1978, Stellar Atmosphere, 2d Ed. Freeman and Cie Google Scholar
Morel, P., Provost, J., Berthomieu, G. 1990, Solar Physics 128, 7 Google Scholar
Morel, P., Van’t Veer, C., Berthomieu, G., Cayrel, R., Castelli, F., Goupil, M.J., Lebreton, Y., Provost, J. 1992, in preparationGoogle Scholar