集群超紧凑的HII区域-- III。静止恒星周围的彗星形态
Clumpy ultracompact HII regions -- III. Cometary morphologies around stationary stars
摘要：
彗星的超致密HII区域被模拟为运动恒星的高超音速风与围绕恒星的分子云的相互作用。我们在这里表明，一个类似的形态可以随之而来，即使恒星是静止的云材料。我们假设，HII区域是在一个恒星风气泡，这是强烈的质量加载：彗星形状的结果从梯度分布的质量加载源。这个模型避免了在移动恒星模型中恒星必须具有高空间速度的问题。
英文摘要：
Cometary ultracompact HII regions have been modelled as the interaction of the hypersonic wind from a moving star with the molecular cloud which surrounds the star. We here show that a similar morphology can ensue even if the star is stationary with respect to the cloud material. We assume that the HII region is within a stellar wind bubble which is strongly mass loaded: the cometary shape results from a gradient in the distribution of mass loading sources. This model circumvents problems associated with the necessarily high spatial velocities of stars in the moving star models.
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