Large Magellanic Cloud Bar: Evidence of a Warped Bar
Large Magellanic Cloud Bar: Evidence of a Warped Bar
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大麦哲伦云条：扭曲条的证据
DOI：
10.1086/380556
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
A. Subramaniam
中科院分区：
文献类型：
--
作者：
A. Subramaniam
利用光学引力透镜实验II星表中红团星的去红平均星等（I0）研究了大麦哲伦星系棒的几何结构。发现I0的值在东西方向上变化，使得酒吧的东端和伦敦西区相对于酒吧的中心更靠近我们。观察到的最大变异相对于随机误差的最大值具有大于7.6 σ的统计学显著性。I0的变化表明LMC的杆中存在翘曲。在条形图中看到的翘曲和结构表明，条形图可能是一个动态扰动结构。
The geometry of the LMC bar is studied using the dereddened mean magnitudes of the red clump stars (I0) from the Optical Gravitational Lensing Experiment II catalog. The value of I0 is found to vary in the east-west direction such that both the east and the west end of the bar are closer to us with respect to the center of the bar. The maximum observed variation has a statistical significance of more than 7.6 σ with respect to the maximum value of random error. The variation in I0 indicates the presence of warp in the bar of the LMC. The warp and the structures seen in the bar indicate that the bar could be a dynamically disturbed structure.