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FRACTIONATED ACCRETION AND THE SOLAR NEUTRINO PROBLEM By C. S. Jeffery, M. E. Bailey, & J. E. Chambers
 

Summary: FRACTIONATED ACCRETION AND THE SOLAR NEUTRINO PROBLEM
By C. S. Jeffery, M. E. Bailey, & J. E. Chambers
Armagh Observatory, College Hill, Armagh BT61 9DG
During the course of its evolution, the Sun has accreted
substantial quantities of material in the form of asteroids,
comets, planetesimals and proto­planets. This debris is poor
in hydrogen and helium and has substantially enriched the
metallicity of the solar surface which must consequently be
higher than that of the unobserved core. It is well known
that compared with standard solar models a lower core metal­
licity results in a lower core temperature and a reduced
flux of high­energy neutrinos. We estimate how much high­
metallicity material could have been accreted during the so­
lar lifetime, and how such accretion will affect the evolution
of the Sun and other stars. We conclude that a few tens
of Earth masses of fractionated material may have accreted
onto the solar surface, and that this may provide a partial
1

resolution of the solar neutrino problem. The solution may

  

Source: Armagh Observatory
Jeffery, Simon - Armagh Observatory

 

Collections: Physics