The evolution of galaxy in X-ray galaxy groups and clusters

X射线星系团和星系团中星系的演化

• 批准号: 262032-2007
• 负责人: Willis, Jon
• 金额: $ 1.61万
• 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: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=480119
• 关键词: evolution; galaxy; ray; groups; clusters

Clusters of galaxies are equivalent to the towns and cities in which individual galaxies live and grow. My research is based upon finding new galaxy clusters and studying the galaxies they contain. I achieve this using space borne X-ray observatories - named "Newton" and "Chandra" - which capture images of the hot clouds of gas associated with galaxy clusters. The heat contained in the X-ray gas is a clue to how massive the galaxy cluster is - like a mass "label" - it is similar to reading the label on a sweater and working out how big it will be. I then use a wide variety of telescopes - in the optical and infrared, from ground and space - to study the "life history" of each galaxy in each cluster. What results is a huge map of changing galaxy properties (big-small, old-young) each attached to a galaxy cluster, and each cluster with a label telling us how massive it is. To achieve this, my graduate students and I are working with a large, international team of astronomers; just like the national census tells us abouts trends in our nation, this "galaxy census" tells us about how the universe came to look like it does today.

星系团相当于单个星系生活和成长的城镇。我的研究是基于寻找新的星系团和研究它们所包含的星系。我使用太空X射线天文台（名为“牛顿”和“钱德拉”）来实现这一目标，它们捕捉到了与星系团相关的热气体云的图像。包含在X射线气体中的热量是星系团质量的一个线索--就像一个质量“标签”--它类似于阅读毛衣上的标签，并计算出它有多大。然后，我使用各种各样的望远镜-在光学和红外线，从地面和太空-研究每个星系团中每个星系的“生命史”。其结果是一个巨大的地图，改变星系属性（大-小，老-年轻）每个连接到一个星系团，每个星系团都有一个标签告诉我们它的质量。为了实现这一目标，我和我的研究生们正在与一个庞大的国际天文学家团队合作;就像全国人口普查告诉我们我们国家的人口趋势一样，这个“星系普查”告诉我们宇宙是如何变成今天这个样子的。