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

利用引力透镜探索星系群区域中的暗物质分布

• 批准号: 12F02322
• 负责人: 高田 昌広 (2012)
• 金额: $ 1.47万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2015-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12F02322/
• 关键词: useful for education; great public outreach; valuable for astronomers; Exciting; Satisfactory; million classifications; 50k people collaborating; 暗黒物質; 重力レンズ; 銀河サーベイ

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)

2013财年，我们成功地在Space Warps(sw，space ewarps.org)上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。我对人类和机器人的性能进行了比较，我们发现了相当多的候选镜头，而之前的机器人搜索遗漏了这些候选镜头。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(将提交给MNRAS)中进行了总结和介绍。在2013财年英国广播公司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。我们使用了几个世界级的望远镜，包括斯巴鲁(日本拥有)，以确认这确实是一个透镜，并研究了透镜星系的性质，如恒星形成率。我制作了透镜质量模型，该模型计算透镜星系的放大程度，以便得出透镜星系的真实光度和其他类似属性(http://arxiv.org/abs/1503.05824，MNRAS提交)。我们还为公民提供了候选透镜的质量模型(Kueng等人)。2015年)，并发现与这项任务中的专家相比，公民产生的结果非常相似。这是令人鼓舞的，因为随着我们开始寻找数以千计的候选镜头，来自公民的大规模建模帮助将变得至关重要。来自SW的资源具有传统价值，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非常有用，就像我们在Chan等人所做的那样。(2014，http://arxiv.org/abs/1411.5398)

项目成果

Dark matter-baryons separation at the lowest mass scale: The bullet group

• DOI: 10.1093/mnrasl/slu058
• 发表时间: 2014-04
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: F. Gastaldello;F. Gastaldello;M. Limousin;M. Limousin;G. Foëx;Roberto P. Muñoz;T. Verdugo;Verónica Motta;Anupreeta More;Anupreeta More;R. Cabanac;D. Buote;D. Eckert;D. Eckert;S. Ettori;Alexander Fritz;S. Ghizzardi;P. J. Humphrey;M. Meneghetti;M. Rossetti;M. Rossetti

EXTRAORDINARY MAGNIFICATION OF THE ORDINARY TYPE Ia SUPERNOVA PS1-10afx

• DOI: 10.1088/2041-8205/768/1/l20
• 发表时间: 2013-02
• 期刊: The Astrophysical Journal Letters
• 作者: R. Quimby;M. Werner;M. Oguri;S. More;A. More;Masayuki Tanaka;K. Nomoto;T. Moriya;G. Folatelli;K. Maeda;M. Bersten

Adaptive optics observations of the gravitationally lensed quasar SDSS J1405+0959

引力透镜类星体的自适应光学观测 SDSS J1405 0959

• DOI: 10.1093/mnras/stu1621
• 发表时间: 2014
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Cristian E. Rusu;Masamune Oguri;Yosuke Minowa;Masanori Iye;Anupreeta More;Naohisa Inada;Shin Oya
• 通讯作者: Shin Oya

Characterizing SL2S galaxy groups using the Einstein radius

• DOI: 10.1051/0004-6361/201423696
• 发表时间: 2014-09
• 期刊: arXiv: Cosmology and Nongalactic Astrophysics
• 作者: T. Verdugo;T. Verdugo;V. Motta;G. Foëx;J. Forero-Romero;R. Muñoz;R. Pelló;M. Limousin;M. Li