Published October 2017 | Version Published
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Full-Sky Maps of the VHF Radio Sky with the Owens Valley Radio Observatory Long Wavelength Array

  • 1. ROR icon California Institute of Technology

Abstract

21-cm cosmology is a powerful new probe of the intergalactic medium at redshifts 20 ≳ z ≳ 6 corresponding to the Cosmic Dawn and Epoch of Reionization. Current observations of the highly-redshifted 21-cm transition are limited by the dynamic range they can achieve against foreground sources of low-frequency (<200 MHz) of radio emission. We used the Owens Valley Radio Observatory Long Wavelength Array (OVRO-LWA) to generate a series of new modern high-fidelity sky maps that capture emission on angular scales ranging from tens of degrees to ∼15 arcmin, and frequencies between 36 and 73 MHz. These sky maps were generated from the application of Tikhonov-regularized m-mode analysis imaging, which is a new interferometric imaging technique that is uniquely suited for low-frequency, wide-field, drift-scanning interferometers.

Additional Information

© 2018 International Astronomical Union.

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fullsky_maps_of_the_vhf_radio_sky_with_the_owens_valley_radio_observatory_long_wavelength_array.pdf

Additional details

Identifiers

Eprint ID
92450
Resolver ID
CaltechAUTHORS:20190124-105501338

Dates

Created
2019-01-24
Created from EPrint's datestamp field
Updated
2021-11-16
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Caltech Custom Metadata

Caltech groups
Astronomy Department
Series Name
Proceedings IAU Symposium
Series Volume or Issue Number
333