为什么恒星膨胀到红巨星尺寸和从红巨星尺寸收缩，II：对批评者的答复
Why stars inflate to and deflate from red giant dimensions, II: replies to critics
摘要：
在我们1992年的一篇论文中，不透明度驱动的热不稳定性在形成恒星演化过程中的作用得到了充分的说明。这包括经典的问题“{ \it为什么恒星会变成红巨星”}以及随后在氦燃烧阶段形成扩展的“造父变星”{ \it蓝环}。我们对这些进化现象的解释偶尔会在经过评审或未经评审的出版物中被几句话驳回。在最近的一个案例中，多年来我没有对这些批评作出回应，这一事实被解释为这些批评是有根据的。在本文中，它是明确的，这是不是在所有的情况下，这种不稳定性的主导作用，而不是重申和批评被证明是空洞的。
英文摘要：
In a 1992 paper of ours the role of opacity-driven thermal instabilities in shaping the course of stellar evolution was amply illustrated. This included the classical issue of ``{\it why stars become red giants"} as well as the subsequent formation of extended ``Cepheids" {\it blue loops} during the helium burning phases. Our explanation of these evolutionary phenomena has been occasionally dismissed with just a few words in refereed or not refereed publications. In a most recent case, the fact that, through the years, I did not reply to these criticisms is interpreted as evidence that they were well founded. In this paper it is made clear that this is not at all the case, the leading role of such instabilities is instead reaffirmed and the criticisms are shown to be insubstantial.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
