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首页> 外文会议>Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter pt.2 >Illuminating Dark Energy with the Joint Efficient Dark-energy Investigation (JEDI)
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Illuminating Dark Energy with the Joint Efficient Dark-energy Investigation (JEDI)

机译：联合高效暗能量研究（JEDI）照明暗能量

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摘要

The Universe appears to be expanding at an accelerating rate, driven by a mechanism called Dark Energy. The nature of Dark Energy is largely unknown and needs to be derived from observation of its effects. JEDI (Joint Efficient Dark-energy Investigation) is a candidate implementation of the NASA-DOE Joint Dark Energy Mission (JDEM). It will probe the effects of Dark Energy in three independent ways: (1) using Type Ⅰa supernovae as cosmological standard candles over a range of distances, (2) using baryon acoustic oscillations as a cosmological standard ruler over a range of cosmic epochs, and (3) mapping the weak gravitational lensing distortion by foreground galaxies of the images of background galaxies at different distances. JEDI provides crucial systematic error checks by simultaneously applying these three independent observational methods to derive the Dark Energy parameters. The concordance of the results from these methods will not only provide an unprecedented understanding of Dark Energy, but also indicate the reliability of such an understanding. JEDI will unravel the nature of Dark Energy by obtaining observations only possible from a vantage point in space, coupled with a unique instrument design and observational strategy. Using a 2 meter-class space telescope with simultaneous wide-field imaging (～1 deg~2, 0.8 to 4.2 μm in five bands) and multi-slit spectroscopy (minimum wavelength coverage 1 to 2 μm), JEDI will efficiently execute the surveys needed to solve the mystery of Dark Energy.
机译：在一种称为“暗能量”的机制的推动下，宇宙似乎正在以加速的速度扩张。黑暗能量的性质在很大程度上是未知的，需要从对其影响的观察中得出。 JEDI（联合高效暗能量调查）是NASA-DOE联合暗能量任务（JDEM）的候选实现。它将以三种独立的方式探究暗能量的影响：（1）使用Ⅰa型超新星作为一定距离范围内的宇宙学标准蜡烛，（2）使用重子声振荡作为一系列宇宙历元的宇宙学标准尺，以及（3）通过背景星系在不同距离的前景星系映射弱引力透镜畸变。 JEDI通过同时应用这三种独立的观测方法来导出暗能量参数，从而提供了至关重要的系统错误检查。这些方法的结果的一致性不仅将提供对暗能量的空前了解，而且还将表明这种理解的可靠性。 JEDI将通过获得仅从太空有利位置获得的观测资料，以及独特的仪器设计和观测策略，来解开暗能量的本质。 JEDI将使用2米级太空望远镜同时进行宽视场成像（约1 deg〜2，在五个波段中为0.8至4.2μm）和多狭缝光谱法（最小波长覆盖范围为1至2μm），从而有效地执行调查需要解决黑暗能量的奥秘。

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