Nucleosynthesis in jets from a collapsar before the formation of a black hole

Shin Ichiro Fujimoto, Nobuya Nishimura, Masa Aki Hashimoto, Kei Kotake, Shoichi Yamada

Research output: Contribution to journalConference article

Abstract

We have investigated nucleosynthesis inside the jets from a 35 M , low-metallicity collapsar before the formation of a black hole, based on a two-dimensional magneto-hydrodynamic (MHD) simulation of the collapsar, taking into account neutrino interactions both on the MHD simulation and nucleosynthesis. We find that jets are ejected via the magnetic pressure, and that r-process operates in the jets even if the neutrino absorption is taken into account in the nucleosynthesis calculation. This is due to efficient electron captures in the high-density (∼ 1011 gcm-3) region near the rotational axis, fast ejection (> 0.2 in units of speed of light), and relatively low neutrino luminosity (< 5 × 10 52ergss-1). Chemical composition of the neutron-rich nuclei in jets from collapsars with different mass and rotation could be largely different from each other.

Original languageEnglish
JournalProceedings of Science
Publication statusPublished - Dec 1 2008
Event10th Symposium on Nuclei in the Cosmos, NIC 2008 - Mackinac Island, MI, United States
Duration: Jul 27 2008Aug 1 2008

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hydrodynamics
simulation
chemical composition
electron
luminosity
calculation
speed

All Science Journal Classification (ASJC) codes

  • General

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Fujimoto, S. I., Nishimura, N., Hashimoto, M. A., Kotake, K., & Yamada, S. (2008). Nucleosynthesis in jets from a collapsar before the formation of a black hole. Proceedings of Science.

Nucleosynthesis in jets from a collapsar before the formation of a black hole. / Fujimoto, Shin Ichiro; Nishimura, Nobuya; Hashimoto, Masa Aki; Kotake, Kei; Yamada, Shoichi.

In: Proceedings of Science, 01.12.2008.

Research output: Contribution to journalConference article

Fujimoto, SI, Nishimura, N, Hashimoto, MA, Kotake, K & Yamada, S 2008, 'Nucleosynthesis in jets from a collapsar before the formation of a black hole', Proceedings of Science.
Fujimoto SI, Nishimura N, Hashimoto MA, Kotake K, Yamada S. Nucleosynthesis in jets from a collapsar before the formation of a black hole. Proceedings of Science. 2008 Dec 1.
Fujimoto, Shin Ichiro ; Nishimura, Nobuya ; Hashimoto, Masa Aki ; Kotake, Kei ; Yamada, Shoichi. / Nucleosynthesis in jets from a collapsar before the formation of a black hole. In: Proceedings of Science. 2008.
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