Inside the Sun pp 327-340 | Cite as

Using Helioseismic Data to Probe the Hydrogen Abundance in the Solar Core

  • D. O. Gough
  • A. G. Kosovichev
Part of the Astrophysics and Space Science Library book series (ASSL, volume 159)

Abstract

A procedure for inverting helioseismic data to determine the hydrogen abundance in the radiative interior of the sun is briefly described. Using Backus-Gilbert optimal averaging, the variation of sound speed, density and hydrogen abundance in the energy-generating core is estimated from low-degree p-mode frequencies. The result provides some evidence for there having been some redistribution of material during the sun’s main-sequence evolution. The inversion also suggests that the evolutionary age of the sun is perhaps some 10 per cent greater than the generally accepted value, and that the solar neutrino flux, based on standard nuclear and particle physics, is about 75 per cent of the standard-model value.

Keywords

Sound Speed Optimal Average Solar Model Neutrino Flux Ionization Zone 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Backus, G. and Gilbert, F. (1968) Geophys J. R. astr. Soc., 16, 169.ADSMATHGoogle Scholar
  2. Bahcall, J. N. and Ulrich, R. K. (1988) Rev. Mod. Phys., 60, 297.ADSCrossRefGoogle Scholar
  3. Christensen-Dalsgaard, J. (1982) Mon. Not. R. astr. Soc., 199, 735.ADSGoogle Scholar
  4. Christensen-Dalsgaard, J. (1988) Seismology of the sun and sun-like stars (ed. E. J. Rolfe, ESA SP-286, Noordwijk) 431.Google Scholar
  5. Christensen-Dalsgaard, J. and Gough, D. O. (1980) Nature, 288, 544.ADSCrossRefGoogle Scholar
  6. Christensen-Dalsgaard, J. and Gough, D. O. (1981) Astron. Astrophys., 104, 173.ADSGoogle Scholar
  7. Christensen-Dalsgaard, J., Gough, D. O. and Thompson, M. J. (1989) Mon. Not. R. astr. Soc., 238, 481.ADSGoogle Scholar
  8. Déppen, W., Gough, D. O. and Thompson, M. J. (1988) Seismology of the sun and sun-like stars (ed. E. J. Rolfe, ESA SP-286, Noordwijk) 505.Google Scholar
  9. Gough, D. O. (1983) Primordial helium(ed. P. A. Shaver, D. Kunth and K. Kjär, ESO, Garching ) 117.Google Scholar
  10. Gough, D. O. (1984) Mem. Soc. astr. Italiana, 55, 13.ADSGoogle Scholar
  11. Gough, D. O. (1985) Solar Phys., 100, 65.ADSCrossRefGoogle Scholar
  12. Gough, D. O. (1988) Solar-terrestrial relationships and the Earth environment in the last millenia (ed. G. Cini-Castagnoli, Varenna Summer School, Soc. Italiana Fisica) 95, 90.Google Scholar
  13. Gough, D. O. (1989) Dynamiques des fluides astrophysiques (ed. J-P. Zahan and J. Zinn-Justin, Les Houches Session XLVII, 1987, Elsevier) in press.Google Scholar
  14. Gough, D. O. and Kosovichev, A. G. (1988) Seismology of the sun and sun-like stars (ed. E. J. Rolfe, ESA Publ. SP-286, Noordwijk) 195.Google Scholar
  15. Henning, H. M. and Scherrer, P. H. (1986) Seismology of the sun and the distant stars (ed. D. O. Gough, Reidel, Dordrecht ) 55.Google Scholar
  16. Jiménez, A., Pallé, P. L., Roca Cortes, T. and Domingo, V. (1988) Astron. Astrophys., 193, 298.ADSGoogle Scholar
  17. Kosovichev, A. G. and Severny, A. B. (1985) Bull. Crimea. Astrophys. Obs., 72, 188.Google Scholar
  18. Kosovichev, A. G. (1986) Bull. Crimea Astrophys. Obs., 75, 40.ADSGoogle Scholar
  19. Kosovichev, A. G. (1988) Bull. Crimea Astrophys. Obs., 80, 175.ADSGoogle Scholar
  20. Marchuk, G. I. (1977) Methods in Computational Mathematics, Nauka, MoscowGoogle Scholar
  21. Masters, G. (1979) Geophys. J. Roy astr. Soc., 57, 507.Google Scholar
  22. Schatzmann, E., Maeder, A., Angrand, F. and Glowinski, R. (1981) Astron. Astrophys., 96, 1.ADSGoogle Scholar
  23. Shibahashi, H. and Sekii, T. (1988) Seismology of the sun and sun-like stars (ed. E. J. Rolfe, ESA ESP-286, Noordwijk) 471.Google Scholar
  24. Turck-Chieze, S., Cahen, S. and Cassé, M. (1988) Astrophys. J., 335, 415.ADSCrossRefGoogle Scholar
  25. Vorontsov, S. V. (1988) Seismology of the sun and sun-like stars (ed. E. J. Rolfe, ESA ESP-286, Noordwijk) 475.Google Scholar

Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • D. O. Gough
    • 1
    • 2
  • A. G. Kosovichev
    • 3
  1. 1.Institute of Astronomy and Department of Applied Mathematics and Theoretical PhysicsUniversity of CambridgeUK
  2. 2.Joint Institute for Laboratory AstrophysicsUniversity of Colorado and National Institute of Standards and TechnologyBoulderUSA
  3. 3.Crimea Astrophysical ObservatoryNauchny, CrimeaUSSR

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