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Equation of state and helioseismic inversions

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arxiv astro-ph/9702162 v1 pith:XVBWMYPQ submitted 1997-02-19 astro-ph

classification astro-ph
keywords stateequationequationsdatainversionsabundanceadiabaticapplied
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Inversions to determine the squared isothermal sound speed and density within the Sun often use the helium abundance Y as the second parameter. This requires the explicit use of the equation of state (EOS), thus potentially leading to systematic errors in the results if the equations of state of the reference model and the Sun are not the same. We demonstrate how this potential error can be suppressed. We also show that it is possible to invert for the intrinsic difference in the adiabatic exponent Gamma_1 between two equations of state. When applied to solar data such inversion rules out the EFF equation of state completely, while with existing data it is difficult to distinguish between other equations of state.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 24 citations worldwide. Full citation record

  1. Linearity of Structure Kernels in Main-sequence and Subgiant Solar-like Oscillators

    astro-ph.SR 2025-07 conditional novelty 6.0 of 10

    Current linear structure inversions with mixed modes are unreliable for subgiant stars because the mode kernels change too rapidly with evolution, while main-sequence inversions remain valid.

  2. The Future of Solar modelling: requirements for a new generation of solar models

    astro-ph.SR 2025-06 unverdicted novelty 1.0 of 10

    A community review that identifies key uncertainties in solar modelling and outlines priorities for future progress.

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