Bars and their Impact on Galaxy Evolution over the Last Eight Billion Years

新的证据表明，在红移z~1以来的80亿年里，盘星系经历了一个更平静的演化，这是由微小的合并，潮汐诱导的酒吧结构和自发诱导的酒吧。最近的研究实际上已经证明了到z ~ 1的酒吧的丰富性。从GEMS（从形态学和SEDs [光谱能量分布]的星系演化）调查中提取的数千个星系将构成一个大型数据库，结合光学（哈勃太空望远镜，HST），红外（斯皮策太空望远镜）和X射线（钱德拉X射线天文台）数据。该计划预计将提供新的结果酒吧的寿命，酒吧属性的分布，酒吧的结构特性（凸起和中心质量浓度）的影响，环核星星的形成，和他们的宿主星系的中心活动。该计划将为未来的阿塔卡马大型毫米波阵列（阿尔马）的后续行动提供参考基线，因为它的目标是HST/斯皮策/钱德拉扩展深场南部的星系，这是阿尔马科学的一个关键遗产领域。通过一个名为“建立一座通往高中生的桥梁”的外联计划，该项目将为高中生提供在讲习班中学习天文学和研究的机会，在课堂上，通过基于网络的资源，并通过视频会议。它将影响数百名教师和估计21,500名高中学生位于德克萨斯州各地。许多受影响的人是少数民族，特别是不断增长的西班牙裔人口。

Fresh evidence suggests that, over last eight billion years since redshift z~1, disk galaxies underwent a more quiescent evolution that was driven by minor mergers, tidally induced bar structures, and spontaneously induced bars. Recent studies have in fact demonstrated the abundance of bars out to z ~ 1. Thousands of galaxies drawn from the GEMS (Galaxy Evolution from Morphology and SEDs [Spectral Energy Distributions]) survey will make a large database, combining optical (Hubble Space Telescope, HST), infrared (Spitzer Space Telescope) and X-ray (Chandra X-Ray Observatory) data. The program is anticipated to deliver new results on the bar lifetime, the distribution of bar properties, and the impacts of bars on the structural properties (bulges and central mass concentrations), circumnuclear star formation, and central activity of their host galaxies. The program will provide a reference baseline for follow-up with the future Atacama Large Millimeter Array (ALMA), since it targets galaxies in the HST/Spitzer/Chandra Extended Deep Field South, a key legacy field for ALMA science.Through an outreach program named "Building a Bridge to High School Students", this project will provide opportunities for high-school students to learn about astronomy and research in workshops, in the classroom, via web-based resources, and via video conferences. It will influence hundreds of teachers and an estimated 21,500 high school students located all over Texas. Many of those impacted are minorities, particularly the growing Hispanic population.