Imperial College London
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Dr Jonathan R. Pritchard

Faculty of Natural Sciences, Department of Physics

Reader in Astrophysics
 
 
 
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Contact

 

+44 (0)20 7594 7557j.pritchard Website CV

 
 
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Location

 

1018CBlackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@unpublished{Koopmans:2019,
author = {Koopmans, L and Barkana, R and Bentum, M and Bernardi, G and Boonstra, A-J and Bowman, J and Burns, J and Chen, X and Datta, A and Falcke, H and Fialkov, A and Gehlot, B and Gurvits, L and Jeli, V and Klein-Wolt, M and Koopmans, L and Lazio, J and Meerburg, D and Mellema, G and Mertens, F and Mesinger, A and Offringa, A and Pritchard, J and Semelin, B and Subrahmanyan, R and Silk, J and Trott, C and Vedantham, H and Verde, L and Zaroubi, S and Zarka, P},
publisher = {arXiv},
title = {Peering into the dark (Ages) with low-frequency space interferometers},
url = {http://arxiv.org/abs/1908.04296v1},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - UNPB
AB  - Neutral hydrogen pervades the infant Universe, and its redshifted 21-cmsignal allows one to chart the Universe. This signal allows one to probeastrophysical processes such as the formation of the first stars, galaxies,(super)massive black holes and enrichment of the pristine gas from z~6 to z~30,as well as fundamental physics related to gravity, dark matter, dark energy andparticle physics at redshifts beyond that. As one enters the Dark Ages (z>30),the Universe becomes pristine. Ground-based low-frequency radio telescopes aimto detect the spatial fluctuations of the 21-cm signal. Complementary, global21-cm experiments aim to measure the sky-averaged 21-cm signal. Escaping RFIand the ionosphere has motivated space-based missions, such as theDutch-Chinese NCLE instrument (currently in lunar L2), the proposed US-drivenlunar or space-based instruments DAPPER and FARSIDE, the lunar-orbitinterferometer DSL (China), and PRATUSH (India). To push beyond the currentz~25 frontier, though, and measure both the global and spatial fluctuations(power-spectra/tomography) of the 21-cm signal, low-frequency (1-100MHz;BW~50MHz; z>13) space-based interferometers with vast scalable collecting areas(1-10-100 km2), large filling factors (~1) and large fields-of-view (4pi sr.)are needed over a mission lifetime of >5 years. In this ESA White Paper, weargue for the development of new technologies enabling interferometers to bedeployed, in space (e.g. Earth-Sun L2) or in the lunar vicinity (e.g. surface,orbit or Earth-Moon L2), to target this 21-cm signal. This places them in astable environment beyond the reach of most RFI from Earth and its ionosphericcorruptions, enabling them to probe the Dark Ages as well as the Cosmic Dawn,and allowing one to investigate new (astro)physics that is inaccessible in anyother way in the coming decades. [Abridged]
AU  - Koopmans,L
AU  - Barkana,R
AU  - Bentum,M
AU  - Bernardi,G
AU  - Boonstra,A-J
AU  - Bowman,J
AU  - Burns,J
AU  - Chen,X
AU  - Datta,A
AU  - Falcke,H
AU  - Fialkov,A
AU  - Gehlot,B
AU  - Gurvits,L
AU  - Jeli,V
AU  - Klein-Wolt,M
AU  - Koopmans,L
AU  - Lazio,J
AU  - Meerburg,D
AU  - Mellema,G
AU  - Mertens,F
AU  - Mesinger,A
AU  - Offringa,A
AU  - Pritchard,J
AU  - Semelin,B
AU  - Subrahmanyan,R
AU  - Silk,J
AU  - Trott,C
AU  - Vedantham,H
AU  - Verde,L
AU  - Zaroubi,S
AU  - Zarka,P
PB  - arXiv
PY  - 2019///
TI  - Peering into the dark (Ages) with low-frequency space interferometers
UR  - http://arxiv.org/abs/1908.04296v1
UR  - http://hdl.handle.net/10044/1/76713
ER  -
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