ANGULAR MOMENTUM FLUCTUATIONS IN THE CONVECTIVE HELIUM SHELL OF MASSIVE STARS

作者：Gilkis Avishai; Soker Noam

来源：Astrophysical Journal, 2016, 827(1): 40.

DOI：10.3847/0004-637X/827/1/40

<jats:title>ABSTRACT</jats:title>
<jats:p>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 <jats:inline-formula>
<jats:tex-math>
<?CDATA ${M}_{\mathrm{ZAMS}}=15{M}_{\odot }$?>
</jats:tex-math>
<jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="apjaa2be7ieqn1.gif" xlink:type="simple" />
</jats:inline-formula> 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.</jats:p>

• 出版日期2016-8-10