Core‐Collapse Very Massive Stars: Evolution, Explosion, and Nucleosynthesis of Population III 500–1000M⊙Stars

2005/07/31 by Takuya Ohkubo, T. Ohkubo, Hideyuki Umeda +9 · 1 citation
Physics and Astronomy · #Astronomy #Astrophysics #Galaxy #Galaxy cluster #Gamma-ray bursts and supernovae #Halo #Intracluster medium #Nucleosynthesis #Physics #Population #Pulsars and Gravitational Waves Research #Stars #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.1086/504578

published as Astrophys.J.645:1352-1372,2006 · 49 pages, 49 figure files, accepted to ApJ (2006, 645, 2)

arxiv created 2006/05/09 · openalex publication_date 2006/07/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We calculate evolution, collapse, explosion, and nucleosynthesis of Population III very-massive stars with 500M ⊙ and 1000M⊙. Presupernova evolution is calculated in spherical symmetry. Collapse and explosion are calculated by a two-dimensional code, based on the bipolar jet models. We compare the results of nucleosynthesis with the abundance patterns of intracluster matter, hot gases in M82, and extremely metal-poor stars in the Galactic halo. It was found that both 500M ⊙ and 1000M ⊙ models enter the region of pair-instability but continue to undergo core collapse. In the presupernova stage, silicon burning regions occupy a large fraction, more than 20 % of the total mass. For moderately aspherical explosions, the patterns of nucleosynthesis match the observational data of both intracluster medium and M82. Our results suggest that explosions of Population III core-collapse very-massive stars contribute significantly to the chemical evolution of gases in clusters of galaxies. For Galactic halo stars, our [O/Fe] ratios are smaller than the observational abundances. However, our proposed scenario is naturally consistent with this outcome. The final black hole masses are ∼ 230M ⊙ and ∼ 500M ⊙ for the 500M ⊙ and 1000M ⊙ models, respectively. This result may support the view that Population III very massive

Citations

• The Contribution of Population III to the Enrichment and Preheating of the Intracluster Medium
• Formation of the First Stars by Accretion
• The Nucleosynthetic Signature of Population III
• Determination of Nucleosynthetic Yields of Supernovae and Very Massive Stars from Abundances in Metal‐Poor Stars
• Jet-induced Explosions of Core Collapse Supernovae
• Peculiar Chemical Abundances in the Starburst Galaxy M82 and Hypernova Nucleosynthesis
• The Prompt Inventory from Very Massive Stars and Elemental Abundances in L[CLC]y[/CLC]α Systems
• The Minimum Universal Metal Density between Redshifts of 1.5 and 5.5
• Accretion Models of Gamma‐Ray Bursts
• Core-Collapse Supernovae and Their Ejecta
• Nucleosynthesis, Reionization, and the Mass Function of the First Stars
• The Formation of the First Stars. I. The Primordial Star‐forming Cloud
• Accretion onto a primordial protostar
• Formation of the First Supermassive Black Holes
• Are Ultraluminous X‐Ray Sources Intermediate‐Mass Black Holes Accreting from Molecular Clouds?
• Reionization of the Universe and the Early Production of Metals
• Early chemical enrichment of the universe and the role of very massive population III stars
• Stellar evolution with rotation and magnetic fields

Cited by

• POPULATION III GAMMA-RAY BURSTS