Segue 1的起源
The Origin of Segue 1
摘要：
将最优滤波技术应用于Sloan数字巡天测光中，发现在Segue 1附近，星团的外围部分发生了畸变。有强有力的证据表明，潮外星的长度约为1度，向星团的东部和西南部延伸。扩展有类似的差分赫斯图Segue 1。Kolmogorov-Smirnov检验表明，两者都来自相同的父分布的概率很高。Segue 1的位置靠近人马座流的潮汐包裹的交叉点。通过从Sloan的光谱数据库中提取蓝色水平分支星，分离出两个运动学特征，并与人马座流的不同包裹物进行了识别。我们表明，Segue 1是移动的速度接近的包装之一。在这个位置，我们估计有足够的人马座恒星，与Segue 1恒星无法区分，膨胀速度色散，因此质光比。所有可用的证据都与Segue 1是一个星团的解释一致，最初来自人马座星系，现在溶解在银河系中。
英文摘要：
We apply the optimal filter technique to Sloan Digital Sky Survey photometry around Segue 1 and find that the outer parts of the cluster are distorted. There is strong evidence for ~ 1 degree elongations of extra-tidal stars, extending both eastwards and southwestwards of the cluster. The extensions have similar differential Hess diagrams to Segue 1. A Kolmogorov-Smirnov test suggests a high probability that both come from the same parent distribution. The location of Segue 1 is close to crossings of the tidal wraps of the Sagittarius stream. By extracting blue horizontal branch stars from Sloan's spectral database, two kinematic features are isolated and identified with different wraps of the Sagittarius stream. We show that Segue 1 is moving with a velocity that is close to one of the wraps. At this location, we estimate that there are enough Sagittarius stars, indistinguishable from Segue 1 stars, to inflate the velocity dispersion and hence the mass-to-light ratio. All the available evidence is consistent with the interpretation that Segue 1 is a star cluster, originally from the Sagittarius galaxy, and now dissolving in the Milky Way.
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。
