Can very massive Population III stars produce a super-collapsar?

Abstract

A fraction of the first generation of stars in the early Universe may be very massive ($\gtrsim 300{\mathrm{M}}_{\odot }$) as they form in metal-free environments. Formation of black holes from these stars can be accompanied by supermassive collapsars to produce long gamma-ray bursts of a unique type having a very high total energy ($\sim 10^{54}\mathrm{erg}$) as recently suggested by several authors. We present new stellar evolution models of very massive Population III stars including the effect of rotation to provide theoretical constraints on super-collapsar progenitors. We find that the angular momentum condition for super-collapsar can be fulfilled if magnetic torques are ignored, in which case Eddington-Sweet circulations play the dominant role for the transport of angular momentum. We further find that the initial mass range for super-collapsar progenitors would be limited to $300{\mathrm{M}}_{\odot }\lesssim M\lesssim 700{\mathrm{M}}_{\odot }$. However, all of our very massive star models of this mass range end their lives as red supergiants rather than blue supergiants, in good agreement with most of the previous studies. The predicted final fate of these stars is either a jet-powered type IIP supernova or an ultra-long, relatively faint gamma-ray transient, depending on the initial amount of angular momentum.

14 pages, 4 figures, 1 table

References in corpus (5)

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• White dwarf spins from low mass stellar evolution models
• A hot cocoon in the ultralong GRB 130925A: hints of a PopIII-like progenitor in a low density wind environment
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Cited by in corpus (6)

• On the Rotation of Supermassive Stars
• Alternative possibility of GW190521: Gravitational waves from high-mass black hole-disk systems
• On extreme transient events from rotating black holes and their gravitational wave emission
• A Study of Primordial Very Massive Star Evolution. II. Stellar Rotation and Gamma-Ray Burst Progenitors
• Hard X-ray Spectral Investigations of Gamma-ray Bursts, 120521C and 130606A, at High-redshift z~6
• Exploration of the high-redshift universe enabled by THESEUS