Studies of Faint Radio Galaxies

微弱射电星系的研究

• 批准号: 8821016
• 负责人: Rogier Windhorst
• 金额: $ 6.72万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-04-15 至 1993-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8821016&HistoricalAwards=false
• 关键词: Studies; Faint; Radio; Galaxies

A systematic analysis of a unique set of high quality deep survey data that has been collected during the last five years will be carried out. Deep surveys were carried out in several Selected Areas at high galactic latitude with the Very Large Array (VLA) and Westerbork radio telescopes. The surveys were followed up through charge-coupled device (CCD) photometry and imaging with the United Kingdom Infrared Telescope (UKIRT) Infrared Telescope Facility (IRTF), Palomar and the Multiple Mirror Telescope (MMT). The optical data reduction and a thorough analysis of these data will be completed. The following items are the project goals: 1) Establish the nature of faint radio galaxies unambiguously from their morphology on the deep CCD images, the multicolor photometry and the available spectroscopy. 2) A systematic study of the very faint, low surface brightness radio galaxies that constitute the high redshift tail of the radio source population. Radio galaxy redshifts have been measured in the range of z greater than 1 and less than 3. Some of these are good candidate for (elliptical) galaxies in the process of formation. Since these objects are very weak radio sources, they offer a unique opportunity to study the formation of nearly normal galaxies, of their low level active nuclei, and possible mutual relationship in these nearly normal galaxies. 3) A systematic comparison of the optical-infrared data with detailed models for the spectral evolution of galaxies. This will provide important constraints to possible evolutionary models for galaxies, the range in their formation epoch, and the value of the Hubble constant (Ho). These models will incorporate the roll of dust, galactic winds, and red GB, AGB, and Carbon stars.

系统分析一套独特的高质量深度 过去五年收集的调查数据 将被执行。 在几个地区进行了深入调查， 在银河系高纬度的选定区域， 阵列（VLA）和韦斯特博克射电望远镜。 调查是 通过电荷耦合器件（CCD）测光进行跟踪， 英国红外望远镜（UKIRT） 红外望远镜设施（IRTF），帕洛玛和多重 镜面望远镜（MMT）。 光学数据简化和 将完成对这些数据的彻底分析。 的 项目目标如下： 1)毫不含糊地确定微弱射电星系的性质 从它们在深CCD图像上的形态来看， 光度法和可用的光谱法。 2)对非常微弱的低表面的系统研究 构成高红移的亮度射电星系 辐射源的尾部 射电星系红移 在z大于1和小于1的范围内测量 在3. 其中一些是很好的候选人（椭圆形） 形成过程中的星系。 由于这些物体是 非常微弱的无线电源，它们提供了一个独特的机会， 研究近正常星系的形成， 水平活动核，以及它们之间可能的相互关系 几乎是正常的星系 3)光学红外数据的系统比较， 星系光谱演化的详细模型。 这 将为可能的进化提供重要的限制， 星系的模型，其形成时期的范围，以及 哈勃常数（Hubble constant） 这些模型将 包括尘埃卷，银河风，红色GB，AGB， 碳恒星