候选年龄间隙填充LMC团簇的色幅图
Colour-Magnitude Diagrams of candidate age-gap filling LMC clusters
摘要：
大麦哲伦星系有一个丰富的星团系统，跨越了广泛的年龄和质量。大麦哲伦星系团系统的一个显著特征是存在3-10光年的年龄差距。利用南方天文望远镜（SOAR）的光学成像仪（SOI）对4个大麦哲伦星系团进行了成像，它们的综合颜色与中间年龄简单恒星星族一致。它们的色星等图（CMD）达到V ~ 24。等时线拟合，帕多瓦进化模型的基础上，进行了这些CMD，减去现场污染。初步结果如下：KMK 88 -38的年龄约为1.3 Gyr，假设典型的LMC金属丰度和距离模量，以及非常低的再定年。对于OGLE-LMC 0531，与等时线的最佳眼拟合产生年龄~ 1.6 Gyr和E（B-V）=0.03。BSDL 917更年轻，约150岁，灭绝程度更大（E（B-V）=0.08）。目前正在对其余的一组进行分析。因此，我们的结论是，这些clusers是不太可能填补LMC集群年龄差距，即使在参数中的拟合不确定性被认为是。
英文摘要：
The LMC has a rich star cluster system spanning a wide range of ages and masses. One striking feature of the LMC cluster system is the existence of an age gap between 3-10 Gyrs. Four LMC clusters whose integrated colours are consistent with those of intermediate age simple stellar populations have been imaged with the Optical Imager (SOI) at the Southern Telescope for Astrophysical Research (SOAR). Their colour-magnitude diagrams (CMDs) reach V ~ 24. Isochrone fits, based on Padova evolutionary models, were carried out to these CMDs, after subtraction of field contamination. The preliminary results are as follows: KMK88-38 has an age of ~ 1.3 Gyr, assuming typical LMC metallicity and distance modulus, and a very low redenning. For OGLE-LMC0531, the best eye fits to isochrones yield an age ~ 1.6 Gyr and E(B-V)=0.03. BSDL917 is younger, ~ 150 yrs, and subjected to larger extinction (E(B-V)=0.08). The remaining cluster is currently under analysis. Therefore, we conclude that these clusers are unlikely to fill in the LMC cluster age gap, even when fitting uncertainties in the parameters are considered.
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