Collaborative Research: Ground-based Investigations Relevant to the Joint Dark Energy Mission

AST-0426433泰森联合暗能量使命（JDEM）最近通过美国国家航空航天局（NASA）和能源部（DOE）之间的合作协议创建，以探测和表征暗能量及其对宇宙膨胀历史的影响。 由于地面工作将在未来十年内影响我们对暗能量的理解，因此在JDEM启动之前，可以从这些研究中预期的约束应该在JDEM的需求定义阶段发挥明确的作用。 本项目将探讨地面观测活动是否以及如何以任何方式影响JDEM的设计或预测JDEM的任何部分结果。 它将评估交叉校准是否足够精确，以满足JDEM上光学探测器的需求，地面设施可能需要哪些新仪器，以及来自太空的弱透镜调查是否增加了价值。NASA，DOE和NSF都投入了大量资源用于探测和表征暗能量，这些调查为机构间合作提供了极好的机会。 虽然NSF不会也不能直接参与JDEM本身，但科学问题会影响NSF支持的社区，这个项目将有助于定义他们的角色。

AST-0426433TysonThe Joint Dark Energy Mission (JDEM) has recently been created through a cooperative agreement between the National Aeronautics and Space Administration (NASA) and the Department of Energy (DOE) to detect and characterize dark energy and its influence on the cosmic expansion history. Since ground-based work will impact our understanding of dark energy during the next decade, prior to the launch of JDEM, the constraints which can be expected from such studies should play an explicit role in the requirements definition phase of JDEM. The present project will explore whether and how a ground-based observing campaign could in any way influence the design of, or anticipate any part of the results from, the JDEM. It will assess whether cross-calibration can be precise enough to obviate the need for optical detectors on JDEM, what new instrumentation might be necessary at ground-based facilities, and whether a weak lensing survey from space adds value.NASA, DOE, and NSF are all devoting significant resources toward detecting and characterizing dark energy, and these investigations provide an excellent opportunity for inter-agency cooperation. Although the NSF will not, and cannot, be involved directly in JDEM itself, the science questions affect the NSF-supported community, and this project will help to define their role.