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.

亚毫米大气窗口可用于观测早期宇宙尘埃遮蔽活动的远红外辐射。我的小组进行了第一次大的红移调查的星系发射强烈的submm，表征这一重要的星系人口的演变，并促进详细研究的星系与其他望远镜。这项工作发表在2003年的《自然》杂志上，被引用的次数在天文学所有论文中排名前0.1%。从补充的意义上说，了解星系的形成和演化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。我的团队已经启动了有史以来最大的径向速度和金属丰度调查的红巨星在我们最近的螺旋星系邻居，M31。外晕和盘区域的大尺度运动学特征产生了意想不到的重要发现，即一个巨大的扩展盘，半径约为220，000光年，以及一个类似于我们银河系的非旋转贫金属晕。我们对M31外盘和晕的运动学特征的研究在《天文学》杂志上被评为2005年十大发现之一。