Heavy element synthesis through disk winds in a collapsar

S. Fujimoto, Masa-Aki Hashimoto, K. Arai, R. Matsuba

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We investigate heavy element synthesis through thermally driven winds launched from an inner neutron-rich region of an accretion disk in a collapsar. Various heavy elements are found to be produced through the wind. There exist three types of winds characterized by their abundant nuclei: (i) 56Ni, (ii) light (Z = 30 - 45) neutron-rich nuclei, and (iii) light (Z ≤ 44) p-nuclei. We find that Ye,NSE > 0.49, Ye,NSE ≤ 0.45, and 0.45 < Ye,NSE ≤ 0.49 for winds of types (i), (ii), and (iii), respectively, where Ye,NSE is the electron fraction of the wind at T = 9 × 109K. The collasar winds may be a lighter element primary process, suggested from Galactic evolution of Sr, Y, and Zr. The p-nuclei, 92Mo and 94Mo, which are underproduced in oxygen layers in a supernova, can be abundantly synthesized in the collapsar winds.

Original languageEnglish
Pages (from-to)47-50
Number of pages4
JournalNuclear Physics A
Volume758
Issue number1-4 SPEC. ISS.
DOIs
Publication statusPublished - Jul 25 2005

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heavy elements
synthesis
nuclei
neutrons
galactic evolution
accretion disks
supernovae
oxygen
electrons

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Fujimoto, S., Hashimoto, M-A., Arai, K., & Matsuba, R. (2005). Heavy element synthesis through disk winds in a collapsar. Nuclear Physics A, 758(1-4 SPEC. ISS.), 47-50. https://doi.org/10.1016/j.nuclphysa.2005.05.013

Heavy element synthesis through disk winds in a collapsar. / Fujimoto, S.; Hashimoto, Masa-Aki; Arai, K.; Matsuba, R.

In: Nuclear Physics A, Vol. 758, No. 1-4 SPEC. ISS., 25.07.2005, p. 47-50.

Research output: Contribution to journalArticle

Fujimoto, S, Hashimoto, M-A, Arai, K & Matsuba, R 2005, 'Heavy element synthesis through disk winds in a collapsar', Nuclear Physics A, vol. 758, no. 1-4 SPEC. ISS., pp. 47-50. https://doi.org/10.1016/j.nuclphysa.2005.05.013
Fujimoto S, Hashimoto M-A, Arai K, Matsuba R. Heavy element synthesis through disk winds in a collapsar. Nuclear Physics A. 2005 Jul 25;758(1-4 SPEC. ISS.):47-50. https://doi.org/10.1016/j.nuclphysa.2005.05.013
Fujimoto, S. ; Hashimoto, Masa-Aki ; Arai, K. ; Matsuba, R. / Heavy element synthesis through disk winds in a collapsar. In: Nuclear Physics A. 2005 ; Vol. 758, No. 1-4 SPEC. ISS. pp. 47-50.
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