Polarized 30-GHz Emission from Galaxies

来自星系的偏振 30 GHz 发射

• 批准号: 0600462
• 负责人: Thomas Devlin
• 金额: --
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-12-01 至 2007-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0600462&HistoricalAwards=false
• 关键词: Polarized; 30; GHz; Emission; Galaxies

AST-0600462DevlinThe cosmological and astrophysical value of measuring the cosmic microwave background (CMB) anisotropy and polarization is well known. Unfortunately, many details of possible polarized foreground signals are still unknown, and this is expected to be the single most significant obstacle to accurate measurements of the CMB polarization. This trial project will use the Green Bank radio telescope to measure the high frequency polarization of a carefully selected sample of some 35 galaxies, in order to decide on the feasibility and usefulness of a much larger future survey. Such measurements are necessary because prior extensive data are only available for low frequencies, where depolarization effects in transit are significant. Whatever the conclusion about the continued survey, this pilot study will produce useful data on galaxy properties, and will introduce two promising undergraduate students to research with an experienced team.

测量宇宙微波背景（CMB）各向异性和极化的宇宙学和天体物理学价值是众所周知的。不幸的是，许多可能的极化前景信号的细节仍然未知，这预计将是精确测量CMB偏振的唯一最重要的障碍。这个试验项目将使用绿岸射电望远镜来测量精心挑选的大约35个星系样本的高频偏振，以确定未来更大规模调查的可行性和实用性。这种测量是必要的，因为先前的大量数据只能用于低频，在这种情况下，传输中的去极化效应是显著的。无论继续调查的结论如何，这项初步研究将产生有关星系特性的有用数据，并将介绍两名有前途的本科生与一个经验丰富的团队进行研究。