重力レンズ効果を用いた銀河群領域の暗黒物質分布の探求

2013财年，我们在Space Warps （SW, spacewarpss.org）成功进行了两次镜头搜索。我领导了第一次SW镜头搜索并分析了结果。我比较了人类和机器人的表现，我们发现了相当多的候选镜头，这些镜头是之前机器人搜索所遗漏的。我们的工作在论文I- http://arxiv.org/abs/1504.06148和论文II - http://arxiv.org/abs/1504.05587中进行了总结和介绍（提交给MNRAS）。从2013财年BBC现场直播的第二次镜头搜索中，发现了一个有趣的候选镜头。我们使用了包括斯巴鲁（日本所有）在内的几台世界级望远镜来确认这确实是一个透镜，并研究了透镜星系的特性，如恒星形成率。我制作了透镜质量模型，计算透镜星系的放大程度，以得出透镜星系的真实亮度和其他类似属性（http://arxiv.org/abs/1503.05824， MNRAS提交）。我们还为市民（Kueng et al. 2015）启用了透镜候选物的大规模建模，并发现与专家相比，市民在这项任务中产生了相当相似的结果。这是令人鼓舞的，因为在我们开始发现成千上万的候选镜头时，公民对大规模建模的帮助将变得至关重要。来自SW的资源具有遗留价值，例如，我们生成的模拟镜头样本对于测试其他镜头查找算法很有用，就像我们在Chan等人（2014,http://arxiv.org/abs/1411.5398）中所做的那样。

We successfully conducted two lens searches in Space Warps (SW, spacewarps.org) in FY2013. I led the first SW lens search and analysed the results. I made comparisons between the performance of humans vs robots and we find a fairly large number of lens candidates which were missed by previous robotic searches. Our work is summarized and presented in Paper I- http://arxiv.org/abs/1504.06148 and Paper II - http://arxiv.org/abs/1504.05587 (to be submitted to MNRAS).From the second lens search which was conducted live on BBC in FY2013, an intriguing lens candidate was discovered. We used several world class telescopes including Subaru (owned by Japan) to confirm that this truly a lens and studied the properties of the lensed galaxy such as the star-formation rate. I produced the lens mass model which calculates how magnified the lensed galaxy is in order to derive the true luminosity of the lensed galaxy and other such properties (http://arxiv.org/abs/1503.05824, MNRAS submitted).We also enabled mass modelling of the lens candidates for the citizens (Kueng et al. 2015) and found that citizens produce fairly similar results compared to experts in this task. This is encouraging because assistance from citizens on mass modelling will become crucial as we embark upon the discovery of thousands of lens candidates.The resources from SW have legacy value e.g. the simulated lens samples that we generate are useful for testing other lens finding algorithms as we did in Chan et al. (2014, http://arxiv.org/abs/1411.5398)