Solar model with CNO revised abundances
Abstract
Recent three-dimensional, NLTE analyses of the solar spectrum have shown a significant reduction in the C, N, O and Ne abundances leading to a Z/X ratio of the order of 0.0177. We have computed solar models with this new mixture in the OPAL opacity tables. The present He abundance we find seems rather consistent with the helioseismic value. However, the convective envelope is too shallow, and diffusion, even if it reduces the discrepancy, is not able to give the current value. We present some numerical experiments consisting in changing the diffusion velocities and/or the value of opacity at the base of the convective envelope.
Cite
@article{arxiv.astro-ph/0408055,
title = {Solar model with CNO revised abundances},
author = {J. Montalban and A. Miglio and A. Noels and N. Grevesse and M. P. Di Mauro and .},
journal= {arXiv preprint arXiv:astro-ph/0408055},
year = {2007}
}
Comments
3 pages, Proc. SOHO 14 - GONG 2004 Meeting, Yale, 12-16 July 2004, added reference to Basu, S., Antia, H.M., 2004, ApJ 606, L85