Seismic study of the chemical composition of the solar convection zone

Details Seismic study of the chemical composition of the solar convection zone Seismic study of the chemical composition of the solar convection zone

2007-06-20

arxiv.org/abs/0706.3046v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in ApJ

Scientific paper

10.1086/520916

Recent downward revision of solar heavy-element abundances using three-dimensional atmospheric model has introduced serious discrepancies between standard solar models and helioseismic inferences about solar structure. In this paper, we investigate the possibility of determining the heavy-element abundances using helioseismic inversion techniques with the hope of providing an independent estimate. We use the adiabatic index, Gamma_1 (logarithmic partial derivative of pressure with respect to density at constant entropy) as a probe to examine the effects of the total heavy-element abundance, as well as the effects due to the abundance of individual elements. Our inversion results show that the new, lower, abundance increases the discrepancy between the Sun and the solar models.

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