Computer Science – Sound
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aca....42....5d&link_type=abstract
Acta Astronomica (ISSN 0001-5237), vol. 42, no. 1, 1992, p. 5-15. Research supported by National Committee for Scientific Resear
Computer Science
Sound
27
Helioseismology, Opacity, Stellar Evolution, Stellar Models, Abundance, Heavy Elements, Helium, Magnetohydrodynamics, Solar Interior
Scientific paper
The paper presents calculations of models of the sun adopting opacity data of Iglesias and Rogers (1991) for three heavy element mixtures. Calculations were made with a standard stellar evolution code ignoring effects of gravitational settling and the convective overshooting. Using nearly 2300 measured frequencies of solar p-modes, corrections to the sound speed and density distribution in these models were determined. The corrections were found to be significantly smaller than those in models calculated with earlier opacities. The model calculated with the Anders and Grevesse (1989) mixture of heavy elements shows a remarkable agreement with the helioseismic data. There is, however, a contradiction between this consistency and a sizable correction to the surface helium abundance, Delta Y about -0.04. It is argued that this large value may be a spurious result caused by inadequacies in the MHD thermodynamics used in the models.
Dziembowski Wojciech A.
Pamiatnykh A. A.
Sienkiewicz Ryszard
No associations
LandOfFree
Seismological tests of standard solar models calculated with new opacities does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Seismological tests of standard solar models calculated with new opacities, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Seismological tests of standard solar models calculated with new opacities will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-934004