用BFORE测量再电离、中微子质量和宇宙暴胀
Measuring Reionization, Neutrino Mass, and Cosmic Inflation with BFORE
摘要:
BMB是美国航天局的一项高空超长持续时间气球飞行任务,拟在从新西兰瓦纳卡发射的为期28天的中纬度飞行期间测量横跨半边天空的宇宙微波背景。凭借气球平台提供的大角度尺度和高频率的独特访问,BENG将显着改善对再电离τ的光学深度的测量,打破用CMB测量中微子质量所需的参数简并。大的角尺度数据将使BENGINE能够在r~0.01的水平上寻找大尺度引力波B模式信号以及度尺度信号。气球平台允许Bendash在它们占主导地位的频率上绘制银河系尘埃前景,以便将它们与Bendash测量的CMB信号稳健地分离,此外还补充了地面望远镜的数据。频率的组合也将导致对数千个星系团的速度测量,以及探索恒星形成星系如何填充暗物质晕。该任务将是首次在近空间使用TES多色探测器(150/217 GHz和280/353 GHz频段),使用高度多路复用的mSQUID微波读出,提高了这两种技术的技术准备水平。
英文摘要:
BFORE is a NASA high-altitude ultra-long-duration balloon mission proposed to measure the cosmic microwave background (CMB) across half the sky during a 28-day mid-latitude flight launched from Wanaka, New Zealand. With the unique access to large angular scales and high frequencies provided by the balloon platform, BFORE will significantly improve measurements of the optical depth to reionization tau, breaking parameter degeneracies needed for a measurement of neutrino mass with the CMB. The large angular scale data will enable BFORE to hunt for the large-scale gravitational wave B-mode signal, as well as the degree-scale signal, each at the r~0.01 level. The balloon platform allows BFORE to map Galactic dust foregrounds at frequencies where they dominate, in order to robustly separate them from CMB signals measured by BFORE, in addition to complementing data from ground-based telescopes. The combination of frequencies will also lead to velocity measurements for thousands of galaxy clusters, as well as probing how star-forming galaxies populate dark matter halos. The mission will be the first near-space use of TES multichroic detectors (150/217 GHz and 280/353 GHz bands) using highly-multiplexed mSQUID microwave readout, raising the technical readiness level of both technologies.
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