Solar Models with Revised Abundances and Opacities

Details Solar Models with Revised Abundances and Opacities Solar Models with Revised Abundances and Opacities

2008-05-23

arxiv.org/abs/0805.3644v1

Astrophys.J.658:L67-L70,2007

Astronomy and Astrophysics

Astrophysics

10 pages, 1 figure

Scientific paper

10.1086/513694

Using reconstructed opacities, we construct solar models with low heavy-element abundance. Rotational mixing and enhanced diffusion of helium and heavy elements are used to reconcile the recently observed abundances with helioseismology. The sound speed and density of models where the relative and absolute diffusion coefficients for helium and heavy elements have been increased agree with seismically inferred values at better than the 0.005 and 0.02 fractional level respectively. However, the surface helium abundance of the enhanced diffusion model is too low. The low helium problem in the enhanced diffusion model can be solved to a great extent by rotational mixing. The surface helium and the convection zone depth of rotating model M04R3, which has a surface Z of 0.0154, agree with the seismic results at the levels of 1 $\sigma$ and 3 $\sigma$ respectively. M04R3 is almost as good as the standard model M98. Some discrepancies between the models constructed in accord with the new element abundances and seismic constraints can be solved individually, but it seems difficult to resolve them as a whole scenario.

Affiliated with

Also associated with

No associations

Rating

Solar Models with Revised Abundances and 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 Solar Models with Revised Abundances and Opacities, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solar Models with Revised Abundances and Opacities will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-500580