标题： 从黑洞X射线双星反馈中的球状星团形成效率 显示英文标题

标题： Globular cluster formation efficiencies from black-hole X-ray binary feedback

摘要： 我们研究一种情况，其中来自黑洞X射线双星（BHXBs）的反馈有时会在强烈超新星反馈之前开始于年轻的星团内部。这些BHXBs可能在维持virial平衡的同时减少嵌入式年轻星团内的气体比例，这可能有助于球状星团（GCs）在随后的超新星驱动气体逃逸时保持结合。采用一个由BHXB种群模型指导的简单玩具模型，我们产生了与经验推导值一致的GC形成效率。BHXB形成的金属丰度依赖性可以自然解释为什么GC形成效率在低金属丰度时更高。对于关于这种金属丰度依赖性的合理假设，我们的玩具模型可以在某些星系中产生GC金属丰度双峰分布，而不会在场星金属丰度分布中产生双峰分布。 显示英文摘要

摘要： We investigate a scenario in which feedback from black-hole X-ray binaries (BHXBs) sometimes begins inside young star clusters before strong supernova feedback. Those BHXBs could reduce the gas fraction inside embedded young clusters whilst maintaining virial equilibrium, which may help globular clusters (GCs) to stay bound when supernova-driven gas ejection subsequently occurs. Adopting a simple toy model with parameters guided by BHXB population models, we produce GC formation efficiencies consistent with empirically-inferred values. The metallicity dependence of BHXB formation could naturally explain why GC formation efficiency is higher at lower metallicity. For reasonable assumptions about that metallicity dependence, our toy model can produce a GC metallicity bimodality in some galaxies without a bimodality in the field-star metallicity distribution.