Sodium Enrichment in Yellow Supergiants: a Perspective from the Uncertainties of Reaction Rates
- 1 December 2008
- journal article
- Published by IOP Publishing in Chinese Journal of Astronomy and Astrophysics
- Vol. 8 (6), 700-706
- https://doi.org/10.1088/1009-9271/8/6/09
Abstract
Sodium overabundance in yellow supergiants has stumped people for more than 20 years. The purpose of this paper is to explore this problem from the perspective of nuclear physics. We investigate carefully the CNO and NeNa cycles that are responsible for sodium production. We investigate some key reactions in the appropriate network. We show whether and how the sodium output can be affected by the rate uncertainties in these reactions. In this way, we evaluate if a reaction is important enough to deserve a better determination of its rate in terrestrial laboratories.Keywords
This publication has 15 references indexed in Scilit:
- The15O(α,γ)19Ne Reaction Rate and the Stability of Thermonuclear Burning on Accreting Neutron StarsThe Astrophysical Journal, 2007
- The Importance of15O(α,γ)19Ne to X‐Ray Bursts and SuperburstsThe Astrophysical Journal, 2006
- Sodium Excess in Yellow Supergiants: Implications for Rotational Mixing in Massive Main‐Sequence StarsThe Astrophysical Journal, 2005
- New grids of stellar models including tidal-evolution constants up to carbon burningAstronomy & Astrophysics, 2004
- Sodium enrichment of stellar atmospheresAstronomy & Astrophysics, 2002
- Origin of anomalous sodium abundances in yellow supergiantsAstrophysics, 1990
- Thermonuclear reaction rates VAtomic Data and Nuclear Data Tables, 1988
- Investigation of the atmospheres of the stars ?1 Sco (F2 Ia) and ? Sco (F1 II)Astrophysics, 1988
- Hot CNO-Ne Cycle Hydrogen Burning. Thermonuclear Evolution at Constant Temperature and DensityThe Astrophysical Journal, 1973
- Nucleosynthesis in Supernovae.The Astrophysical Journal, 1960