A mixed helium-oxygen shell in some core-collapse supernova progenitors
arXiv:1801.01424 · doi:10.1093/mnras/sty1078
Abstract
We evolve models of rotating massive stars up to the stage of iron core collapse using the MESA code and find a shell with a mixed composition of primarily helium and oxygen in some cases. In the parameter space of initial masses of 13-40 Mo and initial rotation velocities of 0-450 km/s that we investigate, we find a mixed helium-oxygen shell with a significant mass only for a small fraction of the models. While the shell is formed due to rotational mixing, the pre-collapse rotation rate is not very high, as required for an energetic collapse-induced thermonuclear explosion. Our results suggest that the collapse-induced thermonuclear explosion mechanism that was revisited recently can account for at most a small fraction of core-collapse supernovae. The presence of such a mixed helium-oxygen shell still might have some implications for core-collapse supernovae, such as some nucleosynthesis processes when jets are present, or might result in peculiar sub-luminous core-collapse supernovae.
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References in corpus (12)
- Modules for Experiments in Stellar Astrophysics (MESA)
- Millisecond Magnetar Birth Connects FRB 121102 to Superluminous Supernovae and Long Duration Gamma-ray Bursts
- The Status of Multi-Dimensional Core-Collapse Supernova Models
- Theoretical Models of Optical Transients. I. A Broad Exploration of the Duration-Luminosity Phase Space
- An ultraviolet excess in the superluminous supernova Gaia16apd reveals a powerful central engine
- Magnetar-powered superluminous supernovae must first be exploded by jets
- A Planar Jitternig-Jets Pattern in Core-Collapse Supernova Explosions
- Expansion of Kes 73, a Shell Supernova Remnant Containing a Magnetar
- The progenitors of core-collapse supernovae suggest thermonuclear origin for the explosions
- The magnetar model of the superluminous supernova GAIA16apd and the explosion jet feedback mechanism (JFM)
- Thermonuclear explosion of rotating massive stars could explain core-collapse supernovae
- The rotational shear in pre-collapse cores of massive stars