RUI: Radio Wavelength Studies of Early and Large Structures in the Universe

RUI：宇宙早期和大型结构的无线电波长研究

• 批准号: 0071192
• 负责人: R. Partridge
• 金额: $ 21.63万
• 依托单位: Haverford College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0071192&HistoricalAwards=false
• 关键词: RUI; Radio; Wavelength; Studies; Early

AST-0071192PARTRIDGEWhere and how do large structures in the Universe first form and begin to emit starlight? Observations at radio wavelengths, since they are unaffected by obscuration by dust, can be used answer such questions. A series of deep centimeter-wavelength surveys of a region of the sky will be made. These observations will complement excellent optical, IR and X-ray data available. These surveys will enable us to determine the nature and abundance of faint, high-redshift, radio sources and to determine the mechanism responsible for their radio emission. The star formation history of the Universe may thus be calculated without the need to correct for dust extinction as in observing at optical wavelengths. This will enable the improvement of the predictions of the fluctuations, which Extragalactic radio sources will introduce, in current and planned searches for small-scale anisotropies in the cosmic microwave background radiation. In addition, radio observations of the cores of X-ray bright galactic nuclei will be used to estimate the masses of the supermassive black holes that reside there. Included in the planned research are several closely related research projects that are designed to have the right scope for undergraduate students. These projects include improving the counts of radio sources at 8.4 GHz; archival searching of deep radio surveys for variable sources; improving statistics on GHz peaked spectrum sources; and archival searching for high resolution radio (and X-ray) observational data on galactic nuclei.An important part of the planned activities is to repeat a successful experiment funded by a previous NSF grant. There is support for a postdoctoral position, which combines both participation in some of the research activities above and a carefully mentored involvement in undergraduate teaching. The postdoctoral associate will design and teach one astronomy course each year under the close supervision of the principal investigator and the co-principal investigator. The postdoctoral associate will also review the pedagogical techniques. Haverford College will provide support for the teaching activities. This project is funded by the Division of Astronomical Sciences.***

宇宙中的大型结构最初是在哪里以及如何形成并开始发出星光的？无线电波段的观测，由于不受尘埃遮挡的影响，可以用来回答这些问题。将对天空的某一区域进行一系列厘米波长深巡天。这些观测将补充现有的优秀光学、红外和x射线数据。这些调查将使我们能够确定微弱的、高红移的射电源的性质和丰度，并确定其射电发射的机制。这样，宇宙的恒星形成历史就可以计算出来，而不需要像在光学波长观测时那样校正尘埃消光。这将有助于在目前和计划中的对宇宙微波背景辐射的小尺度各向异性的搜索中改进对河外射电源将引入的波动的预测。此外，对x射线明亮星系核核心的射电观测将用于估计位于那里的超大质量黑洞的质量。计划研究包括几个密切相关的研究项目，旨在为本科生提供合适的范围。这些项目包括提高8.4 GHz的射电源数量；变源深射电巡天档案检索改进对GHz峰值频谱源的统计；以及寻找星系核的高分辨率射电（和x射线）观测数据的档案。计划活动的一个重要部分是重复以前由国家科学基金资助的成功实验。支持博士后职位，既参与上述一些研究活动，又参与精心指导的本科教学。该博士后每年将在首席研究员和联合首席研究员的密切监督下设计和教授一门天文学课程。该博士后还将审查教学技术。哈弗福德学院将为教学活动提供支持。该项目由天文科学学部资助