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Issue A&A
Volume 393, Number 3, October III 2002
Page(s) L95 - L98
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20021253



A&A 393, L95-L98 (2002)
DOI: 10.1051/0004-6361:20021253

Letter

Helioseismic limit on heavy element abundance

H. M. Antia1 and S. M. Chitre2

1  Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
2  Department of Physics, University of Mumbai, Mumbai 400098, India

(Received 5 August 2002 / Accepted 27 August 2002)

Abstract
Primary inversions of accurately measured solar oscillation frequencies coupled with the equations of thermal equilibrium and other input physics, enable us to infer the temperature and hydrogen abundance profiles inside the Sun. These profiles also help in setting constraints on the input physics as well as on heavy element abundance in the solar core. Using different treatments of plasma screening for nuclear reaction rates, limits on the cross-section of proton-proton nuclear reaction as a function of heavy element abundance in the solar core are obtained and an upper limit on heavy element abundance in the solar core is also derived from these results.


Key words: Sun: abundances -- Sun: interior -- Sun: oscillations

Offprint request: H. M. Antia, antia@tifr.res.in



© ESO 2002

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