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Technologies for Low Frequency Radio Observations of the Cosmic DawnThe Jet Propulsion Laboratory (JPL) is developing concepts and technologies for low frequency radio astronomy space missions aimed at observing highly redshifted neutral Hydrogen from the Dark Ages. This is the period of cosmic history between the recombination epoch when the microwave background radiation was produced and the re-ionization of the intergalactic medium by the first generation of stars (Cosmic Dawn). This period, at redshifts greater than about 20, is a critical epoch for the formation and evolution of large-scale structure in the universe. The 21-cm spectral line of Hydrogen provides the most promising method for directly studying the Dark Ages, but the corresponding frequencies at such large redshifts are only tens of MHz and thus require space-based observations to avoid terrestrial RFI and ionospheric absorption and refraction. This paper reports on the status of several low frequency technology development activities at JPL, including deployable bi-conical dipoles for a planned lunar-orbiting mission, and both rover-deployed and inflation-deployed long dipole antennas for use on the lunar surface.
Document ID
20150008685
Document Type
Conference Paper
External Source(s)
Authors
Jones, Dayton L. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
May 21, 2015
Publication Date
March 1, 2014
Subject Category
Astronomy
Meeting Information
IEEE Aerospace Conference(Big Sky, MT)
Funding Number(s)
CONTRACT_GRANT: NNA09DB30A
Distribution Limits
Public
Copyright
Other
Keywords
Cosmic Dark Ages
interferometry