Stellar haloes and tidal streams

我的项目集中在星系的微弱边缘，即恒星晕和潮汐流。主要目的是利用这些结构中的化石记录来计算出过去发生的吸积事件。目前，我正在分析M81星系群周围星系的恒星晕。我使用的是地面斯巴鲁望远镜上的超级超级摄像头拍摄的光度数据。通过使用分辨的恒星种群技术，我测量了晕中恒星的分布和金属丰度。此外，我还处理哈勃太空望远镜的数据，以衡量我的结果的完整性。在不久的将来，在我的项目中，计划使用Hyper Suprime Cam数据搜索未发现的矮星系。此外，我还将分析哈勃太空望远镜过去调查中矮星系的恒星晕。

My project is focused on the faint outskirts of galaxies, namely stellar haloes and tidal streams. The main aim is to use the fossil record embedded in these structures to work out the accretion events that happened in the past. Currently, I am analysing the stellar halos of around galaxies of the M81 Group. I am using photometric data taken with the Hyper Suprime Cam on the ground-based Subaru telescope. By using the resolved stellar populations technique, I'm measuring distributions and metallicities of stars in the halo. Moreover, I'm also handling Hubble Space Telescope data for measuring completeness of my results. In near future, searches for undiscovered dwarf galaxies by using Hyper Suprime Cam data are planned during my project. Moreover, I will be analysing stellar halos of dwarf galaxies from past surveys done with the Hubble Space Telescope.