Effects of a New Triple-α Reaction on the s-Process in Massive Stars

スポンサーリンク

概要

• 論文の詳細を見る

• Effects of a new triple-a reaction rate on the s-process during the evolution of a massive star of 25 M_[○!・] are investigated for the first time. Although the s-process in massive stars has been believed to be established with only minor change, we find that the s-process with use of the new rate during the core He-burning is very inefficient compared to the case with the previous triple-α rate. However, the difference of the overproduction is found to be largely compensated by the subsequent C-burning. Since the s-process in massive stars has been attributed so far to the neutron irradiation during core He-burning, our finding reveals the importance of C-burning for the s-process during the evolution of massive stars. Since the overproduction level is not different as a whole for the two distinctly different rates, the weak s-process in massive stars does not testify the validity of the new rate.

• 2012-01-25

著者

• Hashimoto Masa-aki

  Department Of Earth Science And Astronomy College Of Arts And Sciences University Of Tokyo

• Hashimoto Masa-aki

  Department Of Physics Faculty Of Science Kyusyu University

• Ono Masaomi

  Department Of Physics Kyushu University

• Fujimoto Shin-ichiro

  Kumamoto National College Of Technology

• Kikuchi Yukihiro

  Department Of Physics Kanazawa University

• Matsuo Yasuhide

  Department Of Physics Kyushu University

• ONO Masaomi

  Yukawa Institute for Theoretical Physics, Kyoto University:Department of Physics, Kyushu University

関連論文

• Effects of a New Triple-α Reaction Rate on the Helium Ignition of Accreting White Dwarfs
• Synthesis of Heavy Elements in a Helium Star of 32 M_sun inside a Jet of Supernova Explosion
• Nucleosynthesis in a Helium Star of 32 M. Related to MHD Jet of Supernova Explosions
• Explosive Nucleosynthesis in Magnetohydrodynamical Jets from Collapsars(Astrophysics and Cosmology)
• MHD simulations of a collapsar model
• Nuclear flashes toward superbursts in accreting neutron stars
• Exotic cooling on isolated neutron stars with different surface composition
• Effects of QCD phase transition on the collapse and bounce of a differentially rotating massive star
• Observational constrains on a decaying Λ cosmology
• Evolution transition from rapidly rotating neutron stars to strange stars
• Formation of atoms, molecules and the first objects in the universe with a variable cosmological term
• Thermal evolution of the scale factor with a variable cosmological term
• Primordial nucleosynthesis with NACRE nuclear reaction rates
• Abundance Distribution in Supernova Remnant Cas A
• Initial Shock Waves for Explosive Nucleosynthesis in Type II Supernova
• Dispersion of Inferred SNe Ia/SNe II Ratios for Current Models of Supernova Nucleosynthesis
• p-Process nucleosynthesis in a core-collapse supernova
• R-process nucleosynthesis due to inner explosion of a low mass iron-core
• Nitrogen production inside an accretion disk around an intermediate-mass black hole
• Heavy Elements Synthesized in an Accretion Disk around a Black Hole Associated with Gamma-Ray Bursts(Poster)
• Nucleosynthesis inside an Accretion Disk in a Type II Collapsar
• Nuclear flashes ignited deep inside the accreted layer on neutron stars
• Final products of the rp-process and synthesis of p-nuclei on accreting neutron stars
• Neutrino cooling in optically thin accretion flows
• P-Process nucleosynthesis inside supernova-driven supercritical accretion disks : Fallback of explosively burned layers of a progenitor
• Nucleosynthesis inside Supernova-Driven Supercritical Accretion Disks
• Shape of Nuclei in the Crust of Neutron Star : Nuclear Physics
• Possible Evolutionary Transition from Rapidly Rotating Neutron Stars to Strange Stars Due to Spin-Down(Astrophysics and Relativity)
• Nucleosynthesis inside an advection-dominated accretion flow around a black hole
• SUPERNOVA MODELS AND SUPERNOVA NUCLEOSYNTHESIS(Proceedings of Japan-France Seminar on Chemical Evolution of Galaxies with Active Star Formation)
• Gamma-Ray Burst Polarimeter (GAP) aboard the Small Solar Power Sail Demonstrator IKAROS
• Effects of a New Triple-α Reaction on X-Ray Bursts of a Helium-Accreting Neutron Star
• Effects of a New Triple-α Reaction on the s-Process in Massive Stars
• Supernova Nucleosynthesis in Massive Stars
• Explosive Nucleosynthesis in Magnetohydrodynamical Jets from Collapsars (2) Heavy-Element Nucleosynthesis of s, p, r-Processes
• Explosive Nucleosynthesis in Magnetohydrodynamical Jets from Collapsars. II : Heavy-Element Nucleosynthesis of s, p, r-Processes(Astrophysics and Cosmology)
• Effects of a New Triple-α Reaction on the s-Process in Massive Stars
• Effects of a New Triple-α Reaction on X-Ray Bursts of a Helium-Accreting Neutron Star
• Explosive Nucleosynthesis in Magnetohydrodynamical Jets from Collapsars
• Heavy Elements Synthesized in an Accretion Disk around a Black Hole Associated with Gamma-Ray Bursts(Poster)

もっと見る 閉じる

スポンサーリンク