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arXiv 1209.2228astro-ph.IMastro-ph.CO
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欧几里德使命:建立一个参考调查

Euclid Mission: building of a Reference Survey

J. Amiaux, R. Scaramella, Y. Mellier, B. Altieri, C. Burigana, A. Da Silva, P. Gomez, J. Hoar, R. Laureijs, E. Maiorano, D. Magalhaes Oliveira, F. Renk, G. Saav… 展开作者

J. Amiaux, R. Scaramella, Y. Mellier, B. Altieri, C. Burigana, A. Da Silva, P. Gomez, J. Hoar, R. Laureijs, E. Maiorano, D. Magalhaes Oliveira, F. Renk, G. Saavedra Criado, I. Tereno, J. L. Augueres, J. Brinchmann, M. Cropper, L. Duvet, A. Ealet, P. Franzetti, B. Garilli, P. Gondoin, L. Guzzo, H. Hoekstra, R. Holmes, K. Jahnke, T. Kitching, M. Meneghetti, W. Percival, S. Warren, the Euclid collaboration

摘要:

欧几里德是欧空局的一项宇宙视野广域空间任务,旨在解释宇宙膨胀加速的起源。该任务将同时调查两个主要的宇宙学探测:弱引力透镜(WL)和星系团(特别是重子声学振荡,BAO)。只有通过观测分布在整个天空的大量星系,才能达到基本科学目标所要求的极高精度,以便探测暗物质和星系在所有尺度上的分布。所需的极高精度要求从空间进行观测,以限制测量中的所有观测偏差。欧几里德巡天的目标是探测河外天空15000平方度以上的数十亿个星系,其定义是该任务的一个关键参数。它驱动着它的科学潜力,它的持续时间和航天器的质量。参考调查的构建源于广泛和深入调查的高水平科学要求。观测主序列的定义和相关的校准确实是定义阶段的一项重大成就。这一序列的实施证明了在不到6年的时间内覆盖所请求区域的可行性,同时考虑到空间段观测和机动序列的管理费用。该参考任务将用于确定初级科学所需的航天器消耗品的大小。它还将为优化天空中的时间设定框架,以实现初级科学并最大限度地发挥欧几里得遗产的作用。

英文摘要:

Euclid is an ESA Cosmic-Vision wide-field-space mission which is designed to explain the origin of the acceleration of Universe expansion. The mission will investigate at the same time two primary cosmological probes: Weak gravitational Lensing (WL) and Galaxy Clustering (in particular Baryon Acoustic Oscillations, BAO). The extreme precision requested on primary science objectives can only be achieved by observing a large number of galaxies distributed over the whole sky in order to probe the distribution of dark matter and galaxies at all scales. The extreme accuracy needed requires observation from space to limit all observational biases in the measurements. The definition of the Euclid survey, aiming at detecting billions of galaxies over 15 000 square degrees of the extragalactic sky, is a key parameter of the mission. It drives its scientific potential, its duration and the mass of the spacecraft. The construction of a Reference Survey derives from the high level science requirements for a Wide and a Deep survey. The definition of a main sequence of observations and the associated calibrations were indeed a major achievement of the Definition Phase. Implementation of this sequence demonstrated the feasibility of covering the requested area in less than 6 years while taking into account the overheads of space segment observing and maneuvering sequence. This reference mission will be used for sizing the spacecraft consumables needed for primary science. It will also set the framework for optimizing the time on the sky to fulfill the primary science and maximize the Euclid legacy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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