Deployable antenna concepts for the Dark Ages Radio Explorer mission

2013 US National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2013-06-06 DOI:10.1109/USNC-URSI-NRSM.2013.6525025

D. Sigel, V. Bach, M. Thomson, R. Bradley, L. Amaro, J. Lazio, J. Burns

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引用次数: 1

Abstract

The Dark Ages Radio Explorer (DARE) is a concept for a space-based cosmology mission designed to measure the sky-averaged spectrum from the highly-redshifted hyperfine 21 cm transition from neutral hydrogen (J.O. Burns, J. Lazio, et al., Adv. Space Res., 49, 433-450, 2012). From this sky-averaged spectrum, the formation of the first luminous objects at the end of the Dark Ages and during Cosmic Dawn (redshifts z = 11-35) can be tracked by their effect on the neutral intergalactic medium. The specific science objectives for the DARE mission are (1) When did the first stars form? (2) When did the first accreting black holes form? (3) When did Reionization begin? (4) What surprises does the end of the Dark Ages hold (e.g., dark matter decay)? The DARE spacecraft orbits the Moon for a mission lifetime of 3 years and takes data above the lunar farside, the only location in the inner solar system proven to be free of human-generated radio frequency interference and any significant ionosphere.

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黑暗时代无线电探索者任务的可展开天线概念

Dark Ages Radio Explorer (DARE)是一个基于空间的宇宙学任务，旨在测量从中性氢到高红移超精细21厘米跃迁的天空平均光谱(J.O. Burns, J. Lazio, et al.， adva . Space Res.， 49,433 -450, 2012)。从这个天空平均光谱中，可以通过它们对中性星系间介质的影响来追踪黑暗时代末期和宇宙黎明期间第一批发光物体的形成(红移z = 11-35)。DARE任务的具体科学目标是(1)第一批恒星是什么时候形成的?第一个吸积黑洞是什么时候形成的?再电离是什么时候开始的?(4)黑暗时代的结束有什么惊喜(例如，暗物质衰变)?DARE航天器在月球轨道上运行3年，并在月球背面采集数据，月球背面是太阳系内唯一被证明没有人为射频干扰和任何重要电离层的地方。

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2013 US National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)

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