ON THE ACCURACY OF HELIOSEISMIC DETERMINATION OF SOLAR HELIUM ABUNDANCE

Authors
RICHARD O DZIEMBOWSKI WA SIENKIEWICZ R GOODE PR
Citation
O. Richard et al., ON THE ACCURACY OF HELIOSEISMIC DETERMINATION OF SOLAR HELIUM ABUNDANCE, Astronomy and astrophysics (Berlin), 338(2), 1998, pp. 756-760
Citations number
23
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy and astrophysics (Berlin) → ACNP
ISSN journal
00046361
Volume
338
Issue
2
Year of publication
1998
Pages
756 - 760
Database
ISI
SICI code
0004-6361(1998)338:2<756:OTAOHD>2.0.ZU;2-Q
Abstract
The Helium abundance in the solar envelope is one of the most importan t seismic observables. We investigate the accuracy of its determinatio n taking into account uncertainties in the data and in the inversion p rocedure. Our best value for the helium abundance in the photosphere i s Y. = 0.248. The estimated uncertainty of 0.002 is dominated by uncer tainties in the inversion. This does not account for possibly larger i naccuracies in the thermodynamical data.