标题： 早期星系与球状星团系统的二分法 显示英文标题

标题： The dichotomy of early-type galaxies from their globular cluster systems

摘要： 存在两类椭圆星系的证据越来越多，这就需要比较它们球状星团系统的特性。 我收集了约50个暗弱和明亮早期型星系的球状星团系统的性质信息，并根据其母星系的性质进行了研究。 球状星团系统的性质似乎分为两类，而不是与宿主星系的性质遵循连续关系。 在暗弱且盘状的核心未解析的早期型星系中的球状星团系统看起来基本未受干扰，也没有明显的合并历史迹象；而在明亮且盒子状的核心已解析的椭圆星系中的球状星团系统则表现出所有预期的合并事件后的特征。 因此，球状星团系统与主要合并事件可能是早期型星系二分法的原因这一观点是一致的。 显示英文摘要

摘要： Growing evidence for the existence of two classes of ellipticals calls for a comparison of the properties of their globular cluster systems. I compiled information on the properties of over 50 globular cluster systems of faint and bright early-type galaxies, and investigated them in the light of the properties of the parent galaxies. The properties of globular cluster systems appear to separate into two classes rather than to follow continuous relations with their host galaxy properties. Globular cluster systems in faint, disky early-type galaxies with unresolved cores appear essentially unperturbed and show no clear signs of a merger past, while systems in bright, boxy ellipticals with resolved cores show all signs expected after a merger event. The globular cluster systems are therefore compatible with the idea that major merger events could be a cause for the dichotomy of early-type galaxies.