旋转OB星的对流包络
Convective envelopes in rotating OB stars
摘要：
我们研究了自转对大质量恒星外对流区的影响。我们研究旋转的热梯度和Solberg-Hoiland长期的分析发展和数值模型的影响。在旋转信封对流的标准，我们表明，旋转的热梯度的影响要大得多，相反的标志的Solberg-Hoiland标准的效果。总的来说，自转有利于赤道恒星包层中的对流，而在两极的对流程度较小。在一颗20 Msun的恒星以94%的临界角速度旋转时，有两个对流包层，较大的一个厚度为赤道半径的13.2%。在非旋转模型中，相应的对流区的厚度仅为半径的4.6%。大质量恒星中外部对流的发生有许多后果。
英文摘要：
We study the effects of rotation on the outer convective zones of massive stars. We examine the effects of rotation on the thermal gradient and on the Solberg--Hoiland term by analytical developments and by numerical models. Writing the criterion for convection in rotating envelopes, we show that the effects of rotation on the thermal gradient are much larger and of opposite sign to the effect of the Solberg-Hoiland criterion. On the whole, rotation favors convection in stellar envelopes at the equator and to a smaller extent at the poles. In a rotating 20 Msun star at 94% of the critical angular velocity, there are two convective envelopes, with the bigger one having a thickness of 13.2% of the equatorial radius. In the non-rotating model, the corresponding convective zone has a thickness of only 4.6% of the radius. The occurrence of outer convection in massive stars has many consequences.
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