Abstract
We investigate nucleosynthesis inside magnetically driven jets ejected from collapsars, or rotating magnetized stars collapsing to a black hole, based on two-dimensional magnetohydrodynamic simulation of the collapsars during the core collapse. We follow the evolution of the abundances of about 4000 nuclides from the collapse phase to the ejection phase using a large nuclear reaction network. We find that the r-process successfully operates only in the energetic jets (>1051 erg), so that U and Th are synthesized abundantly, even when the collapsars have a relatively small magnetic field (1010 G) and a moderately rotating core before the collapse. The abundance patterns inside the jets are similar to that of the r-elements in the solar system. The higher energy jets have larger amounts of 56Ni. Less energetic jets, which have small amounts of 56Ni, could induce GRB without supernova, such as GRB060505 and GRB060614.
| Original language | English |
|---|---|
| Title of host publication | Origin of Matter and Evolution of Galaxies - 10th International Symposium on Origin of Matter and Evolution of Galaxies |
| Subtitle of host publication | From the Dawn of Universe to the Formation of Solar System, OMEG 2007 |
| Editors | Toshitaka Kajino, Takuma Suda, Takaya Nozawa, Akira Ohnishi, Masayuki Y. Fujimoto, Shigeru Kubono, Kiyoshi Kato |
| Publisher | American Institute of Physics Inc. |
| Pages | 99-104 |
| Number of pages | 6 |
| ISBN (Electronic) | 9780735405370 |
| DOIs | |
| Publication status | Published - Jan 1 2008 |
| Event | 10th International Symposium on Origin of Matter and Evolution of Galaxies: From the Dawn of Universe to the Formation of Solar System, OMEG 2007 - Sapporo, Japan Duration: Dec 4 2007 → Dec 7 2007 |
Publication series
| Name | AIP Conference Proceedings |
|---|---|
| Volume | 1016 |
| ISSN (Print) | 0094-243X |
| ISSN (Electronic) | 1551-7616 |
Other
| Other | 10th International Symposium on Origin of Matter and Evolution of Galaxies: From the Dawn of Universe to the Formation of Solar System, OMEG 2007 |
|---|---|
| Country | Japan |
| City | Sapporo |
| Period | 12/4/07 → 12/7/07 |
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All Science Journal Classification (ASJC) codes
- Ecology, Evolution, Behavior and Systematics
- Ecology
- Plant Science
- Physics and Astronomy(all)
- Nature and Landscape Conservation
Cite this
Nucleosynthesis in Jets from Collapsars. / Fujimoto, Shin Ichiro; Nishimura, Nobuya; Hashimoto, Masa-Aki.
Origin of Matter and Evolution of Galaxies - 10th International Symposium on Origin of Matter and Evolution of Galaxies: From the Dawn of Universe to the Formation of Solar System, OMEG 2007. ed. / Toshitaka Kajino; Takuma Suda; Takaya Nozawa; Akira Ohnishi; Masayuki Y. Fujimoto; Shigeru Kubono; Kiyoshi Kato. American Institute of Physics Inc., 2008. p. 99-104 (AIP Conference Proceedings; Vol. 1016).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Nucleosynthesis in Jets from Collapsars
AU - Fujimoto, Shin Ichiro
AU - Nishimura, Nobuya
AU - Hashimoto, Masa-Aki
PY - 2008/1/1
Y1 - 2008/1/1
N2 - We investigate nucleosynthesis inside magnetically driven jets ejected from collapsars, or rotating magnetized stars collapsing to a black hole, based on two-dimensional magnetohydrodynamic simulation of the collapsars during the core collapse. We follow the evolution of the abundances of about 4000 nuclides from the collapse phase to the ejection phase using a large nuclear reaction network. We find that the r-process successfully operates only in the energetic jets (>1051 erg), so that U and Th are synthesized abundantly, even when the collapsars have a relatively small magnetic field (1010 G) and a moderately rotating core before the collapse. The abundance patterns inside the jets are similar to that of the r-elements in the solar system. The higher energy jets have larger amounts of 56Ni. Less energetic jets, which have small amounts of 56Ni, could induce GRB without supernova, such as GRB060505 and GRB060614.
AB - We investigate nucleosynthesis inside magnetically driven jets ejected from collapsars, or rotating magnetized stars collapsing to a black hole, based on two-dimensional magnetohydrodynamic simulation of the collapsars during the core collapse. We follow the evolution of the abundances of about 4000 nuclides from the collapse phase to the ejection phase using a large nuclear reaction network. We find that the r-process successfully operates only in the energetic jets (>1051 erg), so that U and Th are synthesized abundantly, even when the collapsars have a relatively small magnetic field (1010 G) and a moderately rotating core before the collapse. The abundance patterns inside the jets are similar to that of the r-elements in the solar system. The higher energy jets have larger amounts of 56Ni. Less energetic jets, which have small amounts of 56Ni, could induce GRB without supernova, such as GRB060505 and GRB060614.
UR - http://www.scopus.com/inward/record.url?scp=85036579542&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85036579542&partnerID=8YFLogxK
U2 - 10.1063/1.2943639
DO - 10.1063/1.2943639
M3 - Conference contribution
AN - SCOPUS:85036579542
T3 - AIP Conference Proceedings
SP - 99
EP - 104
BT - Origin of Matter and Evolution of Galaxies - 10th International Symposium on Origin of Matter and Evolution of Galaxies
A2 - Kajino, Toshitaka
A2 - Suda, Takuma
A2 - Nozawa, Takaya
A2 - Ohnishi, Akira
A2 - Fujimoto, Masayuki Y.
A2 - Kubono, Shigeru
A2 - Kato, Kiyoshi
PB - American Institute of Physics Inc.
ER -