A Cosmic Microscope to Probe the Universe from Present to Cosmic Dawn:Dual-element Low-frequency Space VLBI Observatory

AN Tao; JAISWAL Sumit; MOHAN Prashanth; ZHAO Zhen; LAO Baoqiang

doi:10.11728/cjss2019.02.242

A Cosmic Microscope to Probe the Universe from Present to Cosmic Dawn:Dual-element Low-frequency Space VLBI Observatory

doi: 10.11728/cjss2019.02.242

Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030

基金项目:

Supported with funding from the Ministry of Science and Technology of China (2018YFA0404600) and the Chinese Academy of Sciences (114231KYSB20170003)

详细信息

作者简介:
AN Tao,E-mail:antao@shao.ac.cn

中图分类号: P164
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出版历程
- 收稿日期: 2018-09-03
- 修回日期: 2019-01-23
- 刊出日期: 2019-03-15

A Cosmic Microscope to Probe the Universe from Present to Cosmic Dawn:Dual-element Low-frequency Space VLBI Observatory

Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030

Funds:

Supported with funding from the Ministry of Science and Technology of China (2018YFA0404600) and the Chinese Academy of Sciences (114231KYSB20170003)

More Information

Author Bio:
AN Tao,E-mail:antao@shao.ac.cn

摘要

摘要: A space-based Very Long Baseline Interferometry (VLBI) program, named as the Cosmic Microscope, is proposed to involve dual VLBI telescopes in the space working together with giant ground-based telescopes (e.g., Square Kilometre Array, FAST, Arecibo) to image the low radio frequency Universe with the purpose of unraveling the compact structure of cosmic constituents including supermassive black holes and binaries, pulsars, astronomical masers and the underlying source, and exoplanets amongst others. The operational frequency bands are 30, 74, 330 and 1670 MHz, supporting broad science areas. The mission plans to launch two 30-m-diameter radio telescopes into 2 000 km×90 000 km elliptical orbits. The two telescopes can work in flexibly diverse modes. (i) Space-ground VLBI. The maximum space-ground baseline length is about 100 000 km; it provides a high-dynamic-range imaging capacity with unprecedented high resolutions at low frequencies (0.3 mas at 1.67 GHz and 20 mas at 30 MHz) enabling studies of exoplanets and supermassive black hole binaries (which emit nanoHz gravitational waves). (ii) Space-space single-baseline VLBI. This unique baseline enables the detection of flaring hydroxyl masers, and more precise position measurement of pulsars and radio transients at mas level. (iii) Single dish mode, where each telescope can be used to monitor transient bursts and rapidly trigger follow-up VLBI observations. The large space telescope will also contribute in measuring and constraining the total angular power spectrum from the Epoch of Reionization. In short, the Cosmic Microscope offers astronomers the opportunity to conduct novel, frontier science.
- Space VLBI /
- Radio interferometer /
- Low-frequency radio astronomy /
- Transient /
- Exoplanet
Abstract: A space-based Very Long Baseline Interferometry (VLBI) program, named as the Cosmic Microscope, is proposed to involve dual VLBI telescopes in the space working together with giant ground-based telescopes (e.g., Square Kilometre Array, FAST, Arecibo) to image the low radio frequency Universe with the purpose of unraveling the compact structure of cosmic constituents including supermassive black holes and binaries, pulsars, astronomical masers and the underlying source, and exoplanets amongst others. The operational frequency bands are 30, 74, 330 and 1670 MHz, supporting broad science areas. The mission plans to launch two 30-m-diameter radio telescopes into 2 000 km×90 000 km elliptical orbits. The two telescopes can work in flexibly diverse modes. (i) Space-ground VLBI. The maximum space-ground baseline length is about 100 000 km; it provides a high-dynamic-range imaging capacity with unprecedented high resolutions at low frequencies (0.3 mas at 1.67 GHz and 20 mas at 30 MHz) enabling studies of exoplanets and supermassive black hole binaries (which emit nanoHz gravitational waves). (ii) Space-space single-baseline VLBI. This unique baseline enables the detection of flaring hydroxyl masers, and more precise position measurement of pulsars and radio transients at mas level. (iii) Single dish mode, where each telescope can be used to monitor transient bursts and rapidly trigger follow-up VLBI observations. The large space telescope will also contribute in measuring and constraining the total angular power spectrum from the Epoch of Reionization. In short, the Cosmic Microscope offers astronomers the opportunity to conduct novel, frontier science.
- Space VLBI /
- Radio interferometer /
- Low-frequency radio astronomy /
- Transient /
- Exoplanet

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参考文献(33)

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A Cosmic Microscope to Probe the Universe from Present to Cosmic Dawn:Dual-element Low-frequency Space VLBI Observatory

doi: 10.11728/cjss2019.02.242

作者简介:
AN Tao,E-mail:antao@shao.ac.cn

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A Cosmic Microscope to Probe the Universe from Present to Cosmic Dawn:Dual-element Low-frequency Space VLBI Observatory

Author Bio:
AN Tao,E-mail:antao@shao.ac.cn

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留言板

A Cosmic Microscope to Probe the Universe from Present to Cosmic Dawn:Dual-element Low-frequency Space VLBI Observatory

doi: 10.11728/cjss2019.02.242

作者简介: AN Tao,E-mail:antao@shao.ac.cn

计量

出版历程

A Cosmic Microscope to Probe the Universe from Present to Cosmic Dawn:Dual-element Low-frequency Space VLBI Observatory

Author Bio: AN Tao,E-mail:antao@shao.ac.cn

计量

出版历程

目录

作者简介:
AN Tao,E-mail:antao@shao.ac.cn

Author Bio:
AN Tao,E-mail:antao@shao.ac.cn