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

AST-0071192 PARTRIDGE宇宙中的大型结构在哪里以及如何首先形成并开始发出星光？在无线电波段的观测，由于不受尘埃遮蔽的影响，可以用来回答这些问题。 将对天空的一个区域进行一系列深厘米波长的调查。 这些观测将补充现有的出色的光学、红外和X射线数据。这些调查将使我们能够确定微弱，高红移，无线电源的性质和丰度，并确定负责其无线电发射的机制。 因此，可以计算宇宙的星星形成历史，而不需要像在光学波长下观察那样校正尘埃消光。 这将有助于改进对波动的预测，在目前和计划的宇宙微波背景辐射小尺度各向异性研究中，河外射电源将带来波动。 此外，对X射线明亮星系核核心的无线电观测将用于估计居住在那里的超大质量黑洞的质量。 计划中的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。 这些项目包括改进8.4千兆赫的无线电源计数;对可变源的深层无线电勘测进行档案检索;改进关于千兆赫峰值频谱源的统计;对银河核的高分辨率无线电（和X射线）观测数据进行档案检索，计划活动的一个重要部分是重复一项由国家科学基金会以前的赠款资助的成功实验。 有一个博士后职位的支持，它结合了参与上述一些研究活动和认真指导参与本科教学。博士后助理将设计和教授一个天文学课程，每年在首席研究员和共同首席研究员的密切监督下。 博士后助理还将审查教学技术。 哈弗福德学院将为教学活动提供支持。该项目由天文科学司资助。

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.***