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Primary inversions of accurately measured solar oscillation frequenciescoupled with the equations of thermal equilibrium and other input physics,enable us to infer the temperature and hydrogen abundance profiles inside theSun. These profiles also help in setting constraints on the input physics aswell as on heavy element abundance in the solar core. Using differenttreatments of plasma screening for nuclear reaction rates, limits on thecross-section of proton-proton nuclear reaction as a function of heavy elementabundance in the solar core are obtained and an upper limit on heavy elementabundance in the solar core is also derived from these results.Comment: 4 pages, to appear in Astron. Astrophy

Helioseismic limit on heavy element abundance