Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...398l..49c&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 398, no. 1, p. L49-L52.
Astronomy and Astrophysics
Astrophysics
16
Magnesium, Neon, Oxygen, Stellar Cores, Stellar Evolution, Supernovae, Electron Capture, Ignition, Nuclear Astrophysics, Stellar Mass
Scientific paper
The quasi-static evolution of an electron-degenerate ONeMg core is followed up to the point of explosive Ne-O ignition triggered by electron capture. Recently calculated electron-capture rates on 24Mg, 24Na, 20Ne, and 20F are used, and the ignition density is found to be about 8.5 x 10 exp 9 g/cu cm (when the Ledoux criterion for convection is adopted), instead of about 10 exp 10 g/cu cm as in earlier calculations. Such a comparatively low ignition density should lead to complete explosive disruption of the core even if the thermonuclear burning propagated all the way as a conductive, laminar flame. The dependence of the ignition density on the treatment adopted for mixing in the semiconvective region and the astronomical implications of our results are briefly discussed.
Canal Ramon
Isern Jordi
Labay Javier
No associations
LandOfFree
The quasi-static evolution of ONeMg cores - Explosive ignition densities and the collapse/explosion alternative 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 The quasi-static evolution of ONeMg cores - Explosive ignition densities and the collapse/explosion alternative, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The quasi-static evolution of ONeMg cores - Explosive ignition densities and the collapse/explosion alternative will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1869693