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Are recent solar heavy element abundances consistent with helioseismology?

Are recent solar heavy element abundances consistent with helioseismology?. Sarbani Basu H.M. Antia. The Abundances. Envelope models, CZ base and Y forced to have helioseismically determined values. OP opacities give “better” results than OPAL. Serenelli et al. (2009).

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Are recent solar heavy element abundances consistent with helioseismology?

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  1. Are recent solar heavy element abundances consistent with helioseismology? Sarbani Basu H.M. Antia

  2. The Abundances

  3. Envelope models, CZ base and Y forced to have helioseismically determined values

  4. OP opacities give “better” results than OPAL Serenelli et al. (2009)

  5. The outer part of the CZ: The ionization zones

  6. OPAL MHD CEFF (GS/AGS) CEFF (other) EFF (GS) AGS Caffau et al. GS98

  7. More constraints:The initial helium abundance The current CZ helium abundance Yini=0.273 ± 0.006 (random) ± 0.002 (systematic) (Serenelli & Basu 2010) Y=0.2485±0.0035 (Basu & Antia 2008)

  8. CONCLUSIONS • Although the Caffau et al. (2010) solar metallicities are not as high as those of GS98, the match to helioseismology is of a similar quality. • The Caffau et al. (2010) also demonstrate the importance of using opacities calculated with the correct relative abundances of elements. • We should also calculate the equation of state for the relevant mixture. Unfortunately, that is not easy to do!

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