The Square Kilometre Array
The Square Kilometre Array
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DOI：
10.1109/jproc.2009.2021005
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发表时间：
2009-08-01
影响因子：
20.6
通讯作者：
Lazio, T. Joseph L. W.
中科院分区：
文献类型：
--
作者：
Dewdney, Peter E.;Hall, Peter J.;Lazio, T. Joseph L. W.
平方公里阵列(SKA)将是一个超灵敏的射电望远镜，旨在进一步了解宇宙中最重要的现象，包括与宇宙本身的诞生和最终死亡有关的一些现象。在接下来的几年里，SKA将从早期的成型设计过渡到定义明确的设计。本文概述了科学挑战如何转化为技术挑战，最新技术的应用如何提供以负担得起的方式应对这些挑战的潜力，以及最终将如何做出技术选择。SKA将是一个相干连接的天线阵列，分布在大约3000公里的范围内，在厘米和米波长下的总天线收集面积高达106米(2)。一项关键的科学要求是能够对大范围的天空进行敏感的观测(勘测)。SKA的“调查速度”将通过应用现有的最新信号处理技术来实现。SKA科学的影响将在天体粒子物理学和宇宙学、基础物理学、银河系和河外天文学、太阳系科学和天体生物学中广泛感受到。
The Square Kilometre Array (SKA) will be an ultrasensitive radio telescope, built to further the understanding of the most important phenomena in the Universe, including some pertaining to the birth and eventual death of the Universe itself. Over the next few years, the SKA will make the transition from an early formative to a well-defined design. This paper outlines how the scientific challenges are translated into technical challenges, how the application of recent technology offers the potential of affordably meeting these challenges, and how the choices of technology will ultimately be made. The SKA will be an array of coherently connected antennas spread over an area about 3000 km in extent, with an aggregate antenna collecting area of up to 106m(2) at centimeter and meter wavelengths. A key scientific requirement is the ability to carry out sensitive observations of the sky over large areas (surveys). The "survey speed" of the SKA will be enabled by the application of the most up-to-date signal-processing technology available. The SKA science impact will be widely felt in astroparticle physics and cosmology, fundamental physics, galactic and extragalactic astronomy, solar system science, and astrobiology.