Nuclear Reaction Rates and Carbon Star Formation

Details Nuclear Reaction Rates and Carbon Star Formation Nuclear Reaction Rates and Carbon Star Formation

2004-08-21

arxiv.org/abs/astro-ph/0408394v1

Astrophys.J.613:L73-L76,2004

Astronomy and Astrophysics

Astrophysics

accepted for publication in ApJ Letters

Scientific paper

10.1086/424872

We have studied how the third dredge-up and the carbon star formation in low-mass Asymptotic Giant Branch stars depends on certain key nuclear reaction rates. We find from a set of complete stellar evolution calculations of a 2Msun model with Z=0.01 including mass loss, that varying either the N14(p,g)O15 or the 3-alpha reaction rate within their uncertainties as given in the NACRE compilation results in dredge-up and yields that differ by a factor of 2. Model tracks with a higher rate for the 3-alpha rate and a lower rate for the N14(p,g)O15 reaction both show more efficient third dredge-up. New experimental results for the N14(p,g)O15 reaction rates are surveyed, yielding a rate which is about 40% lower than the tabulated NACRE rate, and smaller than NACRE's lower limit. We discuss the possible implications of the revised nuclear reaction stellar evolution calculations that aim to reproduce the observed carbon star formation at low mass, which requires efficient third dredge-up.

Affiliated with

Also associated with

No associations

Rating

Nuclear Reaction Rates and Carbon Star Formation 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 Nuclear Reaction Rates and Carbon Star Formation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nuclear Reaction Rates and Carbon Star Formation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-225737