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 publicationAIP Conference Proceedings
    Pages386-388
    Number of pages3
    Volume847
    DOIs
    Publication statusPublished - 2006
    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
    Duration: 2005 Nov 82005 Nov 11

    Other

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

    Fingerprint

    nuclear fusion
    gamma ray bursts
    nuclei
    ejecta
    supernovae
    magnetohydrodynamic simulation
    nuclides
    massive stars
    ejection
    nuclear reactions
    solar system
    seeds
    neutrons

    Keywords

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

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Fujimoto, S. I., Hashimoto, M. A., Kotake, K., & Yamada, S. (2006). Nucleosynthesis inside Magnetically-Driven Jets in A Gamma-Ray Burst. In AIP Conference Proceedings (Vol. 847, pp. 386-388) https://doi.org/10.1063/1.2234434

    Nucleosynthesis inside Magnetically-Driven Jets in A Gamma-Ray Burst. / Fujimoto, Shin Ichirou; Hashimoto, Masa Aki; Kotake, Kei; Yamada, Shoichi.

    AIP Conference Proceedings. Vol. 847 2006. p. 386-388.

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

    Fujimoto, SI, Hashimoto, MA, Kotake, K & Yamada, S 2006, Nucleosynthesis inside Magnetically-Driven Jets in A Gamma-Ray Burst. in AIP Conference Proceedings. vol. 847, pp. 386-388, 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, Tokyo, 05/11/8. https://doi.org/10.1063/1.2234434
    Fujimoto SI, Hashimoto MA, Kotake K, Yamada S. Nucleosynthesis inside Magnetically-Driven Jets in A Gamma-Ray Burst. In AIP Conference Proceedings. Vol. 847. 2006. p. 386-388 https://doi.org/10.1063/1.2234434
    Fujimoto, Shin Ichirou ; Hashimoto, Masa Aki ; Kotake, Kei ; Yamada, Shoichi. / Nucleosynthesis inside Magnetically-Driven Jets in A Gamma-Ray Burst. AIP Conference Proceedings. Vol. 847 2006. pp. 386-388
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    AB - 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.

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