Nucleosynthesis inside Magnetically-Driven Jets in A Gamma-Ray Burst

Shin Ichirou Fujimoto, Masa Aki Hashimoto, Kei Kotake, Shoichi Yamada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We investigate nucleosynthesis inside jets in a gamma ray bursts (GRB). We have calculated detailed composition of magnetically driven jets related to GRBs with post-processing calculation, which is based on long-term, magneto-hydrodynamic simulations of a rapidly rotating massive star of 40M during core collapse. We follow abundance evolution of about 4000 nuclides inside the jets from the collapse phase to the ejection phase through the jet generation phase with a large nuclear reaction network. We find that the r-process successfully operates inside the jets, so that U and Th are synthesized abundantly. Abundance pattern inside the jets is similar compared to that of r-elements in the solar system. Heavy neutron-rich nuclei ∼ 0.001M can be ejected through the jets. Furthermore, we find that p-nuclei are produced without seed nuclei: not only light p-nuclei, such as 74Se, 78Kr, 84Sr, and 92Mo, but also heavy p-nuclei, 113In, 115Sn, and 138La, can be abundantly synthesized in the jets. The amounts of p-nuclei in the ejecta are much greater than those in core collapse supernovae (SNe). In particular, 92Mo, 113In, 115Sn, and 138La deficient in core collapse SNe, are significantly produced in the ejecta.

Original languageEnglish
Title of host publicationORIGIN OF MATTER AND EVOLUTION OF GALAXIES
Subtitle of host publicationInternational Symposium on Origin of Matter and Evolution of Galaxies 2005: New Horizon of Nuclear Astrophysics and Cosmology
Pages386-388
Number of pages3
DOIs
Publication statusPublished - 2006 Dec 1
EventORIGIN OF MATTER AND EVOLUTION OF GALAXIES: International Symposium on Origin of Matter and Evolution of Galaxies 2005: New Horizon of Nuclear Astrophysics and Cosmology - Tokyo, Japan
Duration: 2005 Nov 82005 Nov 11

Publication series

NameAIP Conference Proceedings
Volume847
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceORIGIN OF MATTER AND EVOLUTION OF GALAXIES: International Symposium on Origin of Matter and Evolution of Galaxies 2005: New Horizon of Nuclear Astrophysics and Cosmology
CountryJapan
CityTokyo
Period05/11/805/11/11

Keywords

  • Gamma rays: bursts
  • Stars: evolution
  • Stars: magnetic fields
  • Stars: nuclear reactions, nucleosynthesis, abundances
  • Supernova: general

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Fujimoto, S. I., Hashimoto, M. A., Kotake, K., & Yamada, S. (2006). Nucleosynthesis inside Magnetically-Driven Jets in A Gamma-Ray Burst. In ORIGIN OF MATTER AND EVOLUTION OF GALAXIES: International Symposium on Origin of Matter and Evolution of Galaxies 2005: New Horizon of Nuclear Astrophysics and Cosmology (pp. 386-388). (AIP Conference Proceedings; Vol. 847). https://doi.org/10.1063/1.2234434