CBASS-South: Completing the C-Band All Sky Survey for the Southern Skies

CBASS-South：完成南部天空的 C 波段全天勘测

• 批准号: 1616227
• 负责人: Anthony C. Readhead
• 金额: $ 49.86万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-01 至 2022-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1616227&HistoricalAwards=false
• 关键词: CBASS; South; Completing; Band; Sky

The objective of the program is to complete the analysis (and release) of maps of the southern half of an all sky radio (5 GHz frequency) intensity and polarization survey. This will aid in the removal of contaminating foregrounds from Cosmic Microwave Background (CMB) studies and will also provide information about our Galaxy's Interstellar Medium (ISM) and magnetic fields. Broader impacts include training of students in instrumentation, international collaboration with students, and a broad outreach program targeting audiences from a variety of age groups and cultural backgrounds. Members of the proposing team play an important role in the development and execution of these programs.The C-Band All Sky Survey (C-BASS) is a radio survey at 5 GHz of the entire sky in total intensity and linear polarization, with resolution of 0.73 degrees, sensitivity of about 0.1 mK rms, and minimal corruption by instrumental systematic errors. The award will allow C-BASS to fulfill its primary goals of characterizing emission mechanisms of the ISM, determining an all-sky template for polarized emission from the Galaxy, and allowing for more accurate separation of intrinsic CMB signals from foreground emission, thus enabling CMB polarization experiments to realize their full potential. CMB polarization is being measured from space by the Planck satellites, and by several current and future ground-based and balloon-borne experiments supported by NSF, NASA, DOE and other agencies.

该计划的目标是完成对全天空无线电(5 GHz频率)强度和偏振测量的南半部地图的分析(和发布)。这将有助于去除宇宙微波背景(CMB)研究中的污染前景，还将提供关于我们银河系的星际介质(ISM)和磁场的信息。更广泛的影响包括对学生进行乐器培训，与学生进行国际合作，以及针对不同年龄段和文化背景的受众的广泛推广计划。C波段全天测量(C-BASS)是一种在5 GHz范围内对整个天空进行的总强度和线偏振的射电测量，分辨率为0.73度，灵敏度约为0.1 MK RMS，仪器系统误差造成的干扰最小。该奖项将使C-BASS能够实现其主要目标，即表征ISM的发射机制，确定来自银河系的极化发射的全天模板，并允许更准确地分离本征CMB信号和前景发射，从而使CMB极化实验实现其全部潜力。由普朗克卫星以及由NSF、NASA、美国能源部和其他机构支持的几个目前和未来的地面和气球载实验正在从太空测量CMB的极化。