ANGULAR MOMENTUM FLUCTUATIONS in the CONVECTIVE HELIUM SHELL of MASSIVE STARS

Avishai Gilkis; Noam Soker

doi:10.3847/0004-637X/827/1/40

ANGULAR MOMENTUM FLUCTUATIONS in the CONVECTIVE HELIUM SHELL of MASSIVE STARS

Avishai Gilkis, Noam Soker

Research output: Contribution to journal › Article › peer-review

Abstract

We find significant fluctuations of angular momentum within the convective helium shell of a pre-collapse massive star-a core-collapse supernova progenitor-that 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 = 15 M_⊙ star, computed using the subsonic 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.

Original language	English
Article number	40
Journal	Astrophysical Journal
Volume	827
Issue number	1
DOIs	https://doi.org/10.3847/0004-637X/827/1/40
State	Published - 10 Aug 2016
Externally published	Yes

Keywords

stars: massive
supernovae: general

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10.3847/0004-637X/827/1/40

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abstract = "We find significant fluctuations of angular momentum within the convective helium shell of a pre-collapse massive star-a core-collapse supernova progenitor-that may facilitate the formation of accretion disks and jets that can explode the star. The convective flow in our model of an evolved MZAMS = 15 M⊙ star, computed using the subsonic 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.",

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N2 - We find significant fluctuations of angular momentum within the convective helium shell of a pre-collapse massive star-a core-collapse supernova progenitor-that may facilitate the formation of accretion disks and jets that can explode the star. The convective flow in our model of an evolved MZAMS = 15 M⊙ star, computed using the subsonic 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.

AB - We find significant fluctuations of angular momentum within the convective helium shell of a pre-collapse massive star-a core-collapse supernova progenitor-that may facilitate the formation of accretion disks and jets that can explode the star. The convective flow in our model of an evolved MZAMS = 15 M⊙ star, computed using the subsonic 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.

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KW - supernovae: general

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ANGULAR MOMENTUM FLUCTUATIONS in the CONVECTIVE HELIUM SHELL of MASSIVE STARS

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Keywords

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