• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Red giants as probes of the structure and evolution of the Milky Way >Hydrodynamic Simulations of Shell Convection in Stellar Cores
【24h】

Hydrodynamic Simulations of Shell Convection in Stellar Cores

机译：恒星核中壳对流的水动力模拟

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Shell convection driven by nuclear burning in a stellar core is a common hydrodynamic event in the evolution of many types of stars. We encounter and simulate this convection (1) in the helium core of a low-mass red giant during core helium flash leading to a dredge-down of protons across an entropy barrier, (2) in a carbon-oxygen core of an intermediate-mass star during core carbon flash, and (3) in the oxygen and carbon burning shell above the silicon-sulfur rich core of a massive star prior to supernova explosion. Our results, which were obtained with the hydrodynamics code HERAKLES, suggest that both entropy gradients and entropy barriers are less important for stellar structure than commonly assumed. Our simulations further reveal a new dynamic mixing process operating below the base of shell convection zones.
机译：由恒星核中的核燃烧驱动的壳对流是许多类型恒星演化中常见的水动力事件。我们遇到并模拟了这种对流（1）在低质量红巨星的氦核中，它在核心氦气闪蒸期间导致了质子穿过熵屏障的疏edge；（2）在中间的碳氧核中（3）在超新星爆炸之前，大质量恒星的富含硅硫的核心上方的氧气和碳燃烧壳中的质量恒星。我们的结果是通过流体动力学代码HERAKLES获得的，表明熵梯度和熵屏障对恒星结构的重要性不如通常假定。我们的模拟进一步揭示了一种新的动态混合过程，该过程在壳对流区的底部下方运行。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号