关于超星系尺度上球状星团的同步形成
About Synchronized Globular Cluster Formation over Supra-galactic Scales
摘要：
观测和理论的论据支持这样的想法，即与$AGN$活动和/或激烈的恒星形成情节的暴力事件在高红移的星系形成的早期阶段发挥了重要作用。作为古老的恒星系统，球状星团似乎有足够的候选者来寻找那些高能现象可能留下的最终签名。对室女座和天炉座星系团中数千个球状星团颜色分布的分析揭示了一些有趣的和以前未被发现的特征的存在。一个简单的模式识别技术，表明存在“颜色调制”，为每个星系团独特的。结果表明，球状星团的形成过程并不是完全随机的，而是包括了一个同步的方式和超银河系的空间尺度形成的球状星团的显着比例。
英文摘要：
Observational and theoretical arguments support the idea that violent events connected with $AGN$ activity and/or intense star forming episodes have played a significant role in the early phases of galaxy formation at high red shifts. Being old stellar systems, globular clusters seem adequate candidates to search for the eventual signatures that might have been left by those energetic phenomena. The analysis of the colour distributions of several thousands of globular clusters in the Virgo and Fornax galaxy clusters reveals the existence of some interesting and previously undetected features. A simple pattern recognition technique, indicates the presence of "colour modulations", distinctive for each galaxy cluster. The results suggest that the globular cluster formation process has not been completely stochastic but, rather, included a significant fraction of globulars that formed in a synchronized way and over supra-galactic spatial scales.
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