Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-07-21
Astrophys.J. 611 (2004) 452-465
Astronomy and Astrophysics
Astrophysics
46 pages, 15 figures. To be published in ApJ vol 611, August 10, 2004
Scientific paper
10.1086/422162
We present a detailed study of the evolution of massive stars of masses 15, 20, 25 and 30 $\msun$ assuming solar-like initial chemical composition. The stellar sequences were evolved through the advanced burning phases up to the end of core oxygen burning. We present a careful analysis of the physical characteristics of the stellar models. In particular, we investigate the effect of the still unsettled reaction $^{12}$C($\alpha$,$\gamma$)$^{16}$O on the advanced evolution by using recent compilations of this rate. We find that this rate has a significant impact on the evolution not only during the core helium burning phase, but also during the late burning phases, especially the shell carbon-burning. We have also considered the effect of different treatment of convective instability based on the Ledoux criterion in regions of varying molecular weight gradient during the hydrogen and helium burning phases. We compare our results with other investigations whenever available. Finally, our present study constitutes the basis of analyzing the nucleosynthesis processes in massive stars. In particular we will present a detail analysis of the {\it s}-process in a forthcoming paper.
El Eid Mounib F.
Meyer Bradley S.
The Lih Sin
No associations
LandOfFree
Evolution of Massive Stars Up to the End of Central Oxygen Burning 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 Evolution of Massive Stars Up to the End of Central Oxygen Burning, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of Massive Stars Up to the End of Central Oxygen Burning will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-309