LiteBIRD satellite: JAXA's new strategic L-class mission for all-sky surveys of cosmic microwave background polarization
LiteBIRD satellite: JAXA's new strategic L-class mission for all-sky surveys of cosmic microwave background polarization
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LiteBIRD 卫星：JAXA 的新战略 L 级任务，用于宇宙微波背景偏振的全天空调查
DOI：
10.1117/12.2563050
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
et al.
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文献类型：
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作者：
Hazumi Masashi;et al.
LiteBIRD是一颗用于研究宇宙背景辐射探测的B模偏振和膨胀的Lite(光)卫星，是一项原始宇宙学和基础物理的空间任务。日本宇宙航空研究开发机构于2019年5月选择LiteBIRD作为战略大型(L级)任务，预计将于2020年代末使用日本宇宙航空研究开发机构的H3火箭发射。LiteBIRD计划以前所未有的精度绘制全天空的宇宙微波背景(CMB)偏振图。它的主要科学目标是对宇宙膨胀的信号进行明确的搜索，要么做出发现，要么排除动机良好的通胀模型。LiteBIRD的测量还将为我们提供对引力的量子本质的洞察，以及超越粒子物理和宇宙学标准模型的其他新物理。为此，LiteBIRD将使用三个望远镜在太阳-地球拉格朗日点L2对34至448千兆赫之间的15个频段进行为期三年的全天观测，以实现总灵敏度为2.16μK-arcmin，在100千兆赫时的典型角分辨率为0.5°。我们提供了LiteBIRD项目的概述，包括科学目标、任务要求、顶层系统要求、操作概念和预期的科学成果。
LiteBIRD, the Lite (Light) satellite for the study of B-mode polarization and Inflation from cosmic background Radiation Detection, is a space mission for primordial cosmology and fundamental physics. JAXA selected LiteBIRD in May 2019 as a strategic large-class (L-class) mission, with its expected launch in the late 2020s using JAXA's H3 rocket. LiteBIRD plans to map the cosmic microwave background (CMB) polarization over the full sky with unprecedented precision. Its main scientific objective is to carry out a definitive search for the signal from cosmic inflation, either making a discovery or ruling out well-motivated inflationary models. The measurements of LiteBIRD will also provide us with an insight into the quantum nature of gravity and other new physics beyond the standard models of particle physics and cosmology. To this end, LiteBIRD will perform full-sky surveys for three years at the Sun-Earth Lagrangian point L2 for 15 frequency bands between 34 and 448 GHz with three telescopes, to achieve a total sensitivity of 2.16 μK-arcmin with a typical angular resolution of 0.5° at 100 GHz. We provide an overview of the LiteBIRD project, including scientific objectives, mission requirements, top-level system requirements, operation concept, and expected scientific outcomes.