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 language | English |
|---|---|
| Pages (from-to) | 47-50 |
| Number of pages | 4 |
| Journal | Nuclear Physics A |
| Volume | 758 |
| Issue number | 1-4 SPEC. ISS. |
| DOIs | |
| Publication status | Published - Jul 25 2005 |
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All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
Cite this
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 journal › Article
}
TY - JOUR
T1 - Heavy element synthesis through disk winds in a collapsar
AU - Fujimoto, S.
AU - Hashimoto, Masa-Aki
AU - Arai, K.
AU - Matsuba, R.
PY - 2005/7/25
Y1 - 2005/7/25
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=20944445782&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=20944445782&partnerID=8YFLogxK
U2 - 10.1016/j.nuclphysa.2005.05.013
DO - 10.1016/j.nuclphysa.2005.05.013
M3 - Article
AN - SCOPUS:20944445782
VL - 758
SP - 47
EP - 50
JO - Nuclear Physics A
JF - Nuclear Physics A
SN - 0375-9474
IS - 1-4 SPEC. ISS.
ER -