Support for observing at the Green Bank 100m Telescope (2)

支持 Green Bank 100m 望远镜观测 (2)

基本信息

批准号：
ST/I00582X/1
负责人：
John Richer
金额：
$ 0.15万
依托单位：
University of Cambridge
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2011
资助国家：
英国
起止时间：
2011 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=ST%2FI00582X%2F1
关键词：
Support observing Green Bank 100m

项目摘要

In a range of wavelengths around 3.5 mm, radio emission from normal star-forming galaxies is expected to be dominated by the free-free mechanism. This free-free emission is usually very weakly constrained by other radio observations since it is swamped by synchrotron radiation at longer wavelengths and dust emission at shorter wavelengths. Mapping the emission of normal galaxies at around 3.5 mm will therefore provide a check of our understanding of physics of radio emission mechanisms and models of normal galaxies. Due to the demanding surface-brightness sensitivity requirements of such observations, they are best done using wide-bandwidth focal plane arrays on large filled-aperture telescopes. We have been awarded the full time request of 15 hours for a pilot project at the Green Bank 100-metre diameter telescope (GBT) to map two nearby galaxies with the MUSTANG bolometer camera operating at 90 GHz. The GBT is by far the largest telescope in the world capable of operating at 90 GHz and the MUSTANG camera is the only general-purpose camera operating at 90 GHz. We request support for travel for one person to the site to carry out these initial observations and train in the remote observing procedures. In-person visits for initial observations is required by the Green Bank procedures. Additionally these observations will be very challenging in terms of absolute calibration requirements, and very dry and clear weather requirements.

在约3.5毫米约3.5毫米的一系列波长中，正常恒星星系的无线电发射预计将由免费的机制主导。这种自由发射通常受到其他无线电观测值的限制，因为它在较长的波长下被同步辐射淹没，并且在较短的波长处被尘埃发射。因此，将正常星系在3.5毫米左右的绘制映射将提供我们对无线电发射机制和正常星系模型物理的理解的检查。由于此类观察结果的表面亮度敏感性要求苛刻，因此最好使用大型填充望远镜上的宽带宽焦平面阵列完成。我们已授予Green Bank 100米直径望远镜（GBT）的飞行员项目的全职要求，以绘制附近两个星系的绘制，其中野马重计摄像头在90 GHz处运行。 GBT是迄今为止最大的望远镜，能够在90 GHz运行，野马相机是唯一在90 GHz运行的通用摄像头。我们要求支持一个人前往现场进行这些初步观察并在远程观察程序中进行训练。绿色银行程序需要面对面访问以进行初步观察。此外，就绝对校准要求以及非常干燥和清晰的天气要求而言，这些观察结果将非常具有挑战性。