Galaxy evolution, near and far

星系演化，近的和远的

• 批准号: 327246-2006
• 负责人: Chapman, Scott
• 金额: $ 2.04万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=364551
• 关键词: Galaxy; evolution; near; far

The atmospheric windows in the submillimetre (submm) can be used to observe the far-infrared(IR) emission from dust-obscured activity in the early Universe. My group conducted the first large redshift survey of galaxies emitting strongly in the submm, characterising the evolution of this important galaxy population, and facilitating the detailed study of the galaxies with other telescopes. The work was announced in Nature (2003), and has a citation record in the top 0.1% of all papers in astronomy. In a complementary sense, much of the information required to understand the formation and evolution of galaxies can be gleaned from high quality `fossil record' data on nearby galaxies. My group has initiated the largest ever radial velocity and metallicity survey of red giant stars in our nearest spiral galaxy neighbor, M31. The large-scale kinematic characterisation of the outer halo and disk regions have yielded unexpected and important discoveries, namely a giant extended disk out to ~220,000 light years radius, and a non-rotating metal-poor halo analogous to that of our own Milky Way. Our kinematic characterisation of the outer disk and halo in M31 made the top-10 discoveries of 2005 in Astronomy magazine.

亚毫米法中的大气窗口可用于观察早期宇宙中尘埃刺激的活动的远红外（IR）发射。我的小组对在Sumbm中强烈发射的星系进行了首次大型红移调查，描述了这一重要星系人群的演变，并促进了与其他望远镜对星系的详细研究。这项工作在《自然界》（2003年）中宣布，并在所有论文中有0.1％的天文学记录。从互补的意义上讲，了解星系的形成和演变所需的许多信息可以从附近星系的高质量“化石记录”数据中收集。我的小组在我们最近的螺旋星系M31中开始了对红色巨星的有史以来最大的径向速度和金属性调查。外晕和磁盘区域的大规模运动学表征产生了意外而重要的发现，即巨大的延伸磁盘升至〜220,000光年的半径，并且与我们自己的乳白色方式相似。我们对M31中外磁盘和光晕的运动学表征使2005年在天文学杂志上发现了前10名。