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Explosion of very massive stars and the origin of intermediate mass black holes

Abstract

We calculate evolution, collapse, explosion, and nucleosynthesis of Population III very massive stars with 500 M and 1000 M. It was found that both 500 M and 1000 M models enter the region of pair-instability but continue to undergo core collapse to black holes. For moderately aspherical explosions, the patterns of nucleosynthesis match the observational data of intergalactic and intercluster medium and hot gases in M82, better than models involving hypernovae and pair instability supernovae.

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. The final black hole masses are about 500 M for our most massive 1000 M models. This result may support the view that Population III very massive stars are responsible for the origin of intermediate mass black holes which were recently reported to be discovered.

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Explosion of very massive stars and the origin of intermediate mass black holes

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