The Adiabatic Exponent in the Solar Core

Details The Adiabatic Exponent in the Solar Core The Adiabatic Exponent in the Solar Core

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...500l.199e&link_type=abstract

Astrophysical Journal Letters v.500, p.L199

Astronomy and Astrophysics

Astronomy

50

Equation Of State, Sun: Interior, Sun: Oscillations

Scientific paper

We present helioseismic inversions of solar p-mode frequencies obtained by the Michelson Doppler Imager instrument of the Solar Oscillation Investigation project on board SOHO, which indicate a lower central value for the adiabatic exponent Gamma 1 in the Sun than in current models. We show how the inclusion of relativistic effects in the equation of state removes the discrepancy and allows almost perfect agreement in Gamma 1 between the models and the Sun. This increases our confidence both in the reliability of the equation-of-state calculation and the determination of solar p-mode frequencies.

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