R-process nucleosynthesis in the neutrino-heated relativistic collapsar jet model for gamma-ray bursts

Ko Nakamura, Seiji Harikae, Toshitaka Kajino, Grant J. Mathews

研究成果: Conference contribution

抜粋

We have investigated r-process nucleosynthesis within the collapsar jet model for long-duration gamma ray bursts. We simulated the core collapse of a rotating 35 solar mass progenitor star and followed the magnetohydrodynamic evolution to form a stable black-hole accretion disk. The transport of neutrinos emitted from the accretion disk was then evolved using a ray-tracing method to estimate the heating via neutrino pair annihilation in the polar region above the black hole leading to the production of a relativistic jet. We then distributed test particles in the outflow and followed the time evolution of the temperature, entropy, electron fraction, and density along each trajectory. Nuclear species were evolved for these trajectories with a large nuclear reaction network including more than 5,000 nuclei. We found that an r-process-like abundance distribution forms in material ejected in the collapsar jet.

元の言語English
ホスト出版物のタイトルProceedings of Science
出版物ステータスPublished - 2012
外部発表Yes
イベント12th International Symposium on Nuclei in the Cosmos, NIC 2012 - Cairns, QLD, Australia
継続期間: 2012 8 52012 8 12

Other

Other12th International Symposium on Nuclei in the Cosmos, NIC 2012
Australia
Cairns, QLD
期間12/8/512/8/12

    フィンガープリント

ASJC Scopus subject areas

  • General

これを引用

Nakamura, K., Harikae, S., Kajino, T., & Mathews, G. J. (2012). R-process nucleosynthesis in the neutrino-heated relativistic collapsar jet model for gamma-ray bursts. : Proceedings of Science