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Shin-ichirou Fujimoto, Kenzo Arai, Ryuichi Matsuba, Masa-aki Hashimoto, Osamu Koike, Shin Mineshige, Nucleosynthesis inside Supernova-Driven Supercritical Accretion Disks, Publications of the Astronomical Society of Japan, Volume 53, Issue 3, 25 June 2001, Pages 509–516, https://doi.org/10.1093/pasj/53.3.509
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Abstract
We have investigated nucleosynthesis in a supercritical accretion disk around a compact object of |$1.4\,{{{M}_{\odot}}}$|, using the self-similar solution of an optically thick advection dominated flow. Supercritical accretion is expected to occur in a supernova with fallback material accreting onto a new-born compact object. It has been found that appreciable nuclear reactions take place even for a reasonable value of the viscosity parameter, |$\alpha_{\mathrm{vis}} \simeq 0.01$|, when the accretion rate |$\dot{m} = \dot{M}c^2/(16 L_{\mathrm{Edd}}) \gt 10^5$|, where |$L_{\mathrm{Edd}}$| is the Eddington luminosity. If |$\dot{m} \ge 4 \times 10^6$|, all heavy elements are destroyed to |${{4\atop} \mathrm{He}}$| through photodisintegrations at the inner part of the disk. Even |${{4\atop} \mathrm{He}}$| is also disintegrated to protons and neutrons near the inner edge when |$\dot{m} \ge 2 \times 10^7$|. If the fallback matter of the supernova explosion has the composition of a helium-rich layer of the progenitor, a considerable amount of |${{44\atop} \mathrm{Ti}}$| could be ejected via a jet from the disk.
