Nucleosynthesis inside an accretion disk in a type II collapsar

Ryuichi Matsuba, Kenzo Arai, Shin Ichirou Fujimoto, Masa Aki Hashimoto

研究成果: ジャーナルへの寄稿学術誌査読

7 被引用数 (Scopus)


Taking into account the increasing mass of a central object through fall-back, we investigated nucleosynthesis inside an accretion disk formed during a core collapse of a massive star. It has been confirmed that the disk is an advection-dominated accretion flow supported by gas or radiation pressure. A sequence of (α, γ) reactions take place and Fe-group elements are produced inside the disk. At the early phase of the fall-back, when O-rich materials inflow, the ejected gas contains abundant 54Fe and 56,58Ni. At the late phase the in-coming material is He-rich and the out-going gas is abundant of 44Ti as well as Fe and Ni. Provided that the processed gas outflows from the inner region up to the ejection radius, rej, we find that the ejected mass of the heavy elements is not very sensitive to rej, as long as we take rej ≥ 50r g, because these elements are produced mainly in the region 20-100rg.

ジャーナルPublications of the Astronomical Society of Japan
出版ステータス出版済み - 2004

!!!All Science Journal Classification (ASJC) codes

  • 天文学と天体物理学
  • 宇宙惑星科学


「Nucleosynthesis inside an accretion disk in a type II collapsar」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。