A. Manchado, E. Villaver, G. García-Segura, L. Bianchi
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引用次数: 0
摘要
NGC 7293，螺旋星云，代表了一个罕见的例子，在这个例子中，恒星演化的理论预测可以通过观测来准确地验证，因为恒星的精确视差距离、速度和固有运动是众所周知的。我们提出了螺旋PN形成的数值模拟，该模拟完全受原恒星质量、恒星演化历史和恒星-星际介质(ISM)相互作用的限制。在模拟中，多个弓形激波结构是由激波锋面的破碎形成的，在这里，恒星风与ISM发生了直接的相互作用。
On the making of a PN: the interaction of a multiple stellar wind with the ISM
Abstract NGC 7293, the Helix nebula, represents one of the rare instances in which theoretical predictions of stellar evolution can be accurately tested against observations since the precise parallax distance and the velocity and proper motion of the star are well known. We present numerical simulations of the formation of the Helix PN that are fully constrained by the progenitor stellar mass, stellar evolution history, and star-interstellar medium (ISM) interaction. In the simulations, multiple bow-shock structures are formed by fragmentation of the shock front where the direct interaction of the stellar wind with the ISM takes place.
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