Angular momentum fluctuations in the convective helium shell of massive stars

Abstract

We find significant fluctuations of angular momentum within the convective helium shell of a pre-collapse massive star - a core-collapse supernova progenitor - which may facilitate the formation of accretion disks and jets that can explode the star. The convective flow in our model of an evolved M_ZAMS=15Msun star, computed with the sub-sonic hydrodynamic solver MAESTRO, contains entire shells with net angular momentum in different directions. This phenomenon may have important implications for the late evolutionary stages of massive stars, and for the dynamics of core-collapse.

Accepted for publication in ApJ

References in corpus (21)

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• Implications of post-kick jets in core collapse supernovae
• Disappearance of a massive star in the Andromeda Galaxy due to formation of a black hole
• The rotational shear in pre-collapse cores of massive stars
• Possible post-kick jets in SN 1987A
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