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arXiv 1709.01338astro-ph.IM
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全天空广播SETI

All-sky Radio SETI

Michael Garrett, Andrew Siemion, Wim van Cappellen

摘要:

在过去十年中,孔径阵列(AA)已成功取代抛物面天线,成为低射频的首选技术-MWA、LWA和LOFAR就是很好的例子。基于孔径阵列的望远镜具有多个优势,包括在非常宽的视场范围内对天空的灵敏度。随着数字和数据处理系统的不断发展,即使在GHz频率下,也将出现全天空能力。我们认为,假设SETI事件在本质上是罕见的和短暂的,一个大视场的仪器,在所谓的水坑(1 - 2 GHz)周围工作,可能会提供一些优势,比当代搜索。亚瑟·C爵士克拉克是第一个认识到全天空无线电SETI能力的潜在重要性的人,正如他在《帝国地球》一书中所提出的那样。作为全球SKA(平方公里阵列)项目的一部分,称为MANTIS(中频孔径阵列瞬态和强度映射系统)的中频孔径阵列(MFAA)原型现在被认为是SKA-2的前身。MANTIS可以被看作是在GHz频率上实现全天空无线电SETI能力的第一步。这一发展有可能改变SETI研究领域,以及其他几个科学计划。

英文摘要:

Over the last decade, Aperture Arrays (AA) have successfully replaced parabolic dishes as the technology of choice at low radio frequencies - good examples are the MWA, LWA and LOFAR. Aperture Array based telescopes present several advantages, including sensitivity to the sky over a very wide field-of-view. As digital and data processing systems continue to advance, an all-sky capability is set to emerge, even at GHz frequencies. We argue that assuming SETI events are both rare and transitory in nature, an instrument with a large field-of-view, operating around the so-called water-hole (1-2 GHz), might offer several advantages over contemporary searches. Sir Arthur C. Clarke was the first to recognise the potential importance of an all-sky radio SETI capability, as presented in his book, Imperial Earth. As part of the global SKA (Square Kilometre Array) project, a Mid-Frequency Aperture Array (MFAA) prototype known as MANTIS (Mid- Frequency Aperture Array Transient and Intensity-Mapping System) is now being considered as a precursor for SKA-2. MANTIS can be seen as a first step towards an all-sky radio SETI capability at GHz frequencies. This development has the potential to transform the field of SETI research, in addition to several other scientific programmes.

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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