M31的膨胀
The Bulge of M31
摘要：
凸出物不仅仅是位于大螺旋中心的椭圆形亚星系。从它们的年龄和化学性质来看，似乎是这样的，但自从第一个长缝光谱被获得以来，人们就知道凸起的运动学是不同的。M31提供了最好的机会来调查所有的问题的恒星星族的隆起。这篇评论收集了过去十年积累的一系列探测数据。但有趣的问题是，它是如何形成的？'仍然存在。
英文摘要：
Bulges are not just elliptical subgalaxies situated in the centers of large spirals. It might seem that way from their ages and chemistry, but bulge kinematics have been known to be different since the first long slit spectra were obtained. M31 presents the best opportunity to investigate all the issues of the stellar populations of bulges. This review collects the array of probing data that has been accumulated in the last decade. But the intriguing question `how did it form like this ?' remains.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
