关于动力学，星系团的质量究竟告诉了我们什么？
What do dynamical cluster masses really tell us about dynamics?
摘要：
诊断年龄与质光比图经常被用来限制恒星初始质量函数的形状，以及河外年轻到中等年龄的大质量星团的稳定性和潜在寿命。在这里，我们探讨了与这种方法相关的陷阱，以及它在银河系疏散星团中的应用潜力。我们的结论是，对于一个疏散星团生存的任何显着部分的哈勃时间（在没有实质性的外部扰动），这是一个必要的，但不是一个充分的条件，位于接近预测的光度演化序列的“正常”简单的恒星星族。
英文摘要：
The diagnostic age versus mass-to-light ratio diagram is often used in attempts to constrain the shape of the stellar initial mass function, and the stability and the potential longevity of extragalactic young to intermediate-age massive star clusters. Here, we explore the pitfalls associated with this approach and its potential for use with Galactic open clusters. We conclude that for an open cluster to survive for any significant fraction of a Hubble time (in the absence of substantial external perturbations), it is a necessary but not a sufficient condition to be located close to the predicted photometric evolutionary sequences for "normal" simple stellar populations.
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