Constraining the substructure of dark matter haloes with galaxy–galaxy lensing
Constraining the substructure of dark matter haloes with galaxy–galaxy lensing
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DOI：
10.1093/mnras/stt133
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发表时间：
2012-10
影响因子：
4.8
通讯作者：
Ran Li;H. Mo;Z. Fan;Xiaohu Yang;F. V. D. Bosch
中科院分区：
文献类型：
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作者：
Ran Li;H. Mo;Z. Fan;Xiaohu Yang;F. V. D. Bosch
利用斯隆数字巡天(SDSS)建立的星系群，我们分析了驻留在不同宿主晕和位于不同晕中心距离的卫星星系周围预期的星系-星系透镜信号。我们使用马尔可夫链蒙特卡罗方法从类似SDSS的观测和类似于大型天气观测望远镜(LSST)的观测中探索与卫星星系相关的亚晕的质量和密度分布的潜在约束。我们的结果表明，对于类似SDSS的观测，我们只能对亚晕的平均质量设置一个宽松的约束。然而，对于类似LSST的观测，亚晕的平均质量和密度分布都可以得到很好的约束。
With galaxy groups constructed from the Sloan Digital Sky Survey (SDSS), we analyse the expected galaxy-galaxy lensing signals around satellite galaxies residing in different host haloes and located at different halo-centric distances. We use a Markov chain Monte Carlo method to explore the potential constraints on the mass and density profile of subhaloes associated with satellite galaxies from SDSS-like surveys and surveys similar to the Large Synoptic Survey Telescope (LSST). Our results show that for SDSS-like surveys, we can only set a loose constraint on the mean mass of subhaloes. With LSST-like surveys, however, both the mean mass and the density profile of subhaloes can be well constrained.