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Full-Sky Maps of the VHF Radio Sky with the Owens Valley Radio Observatory Long Wavelength Array

Authors :
Jelić, Vibor
van der Hulst, Thijs
Eastwood, Michael W.
Hallinan, Gregg
Jelić, Vibor
van der Hulst, Thijs
Eastwood, Michael W.
Hallinan, Gregg
Publication Year :
2017

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.

Details

Database :
OAIster
Notes :
application/pdf, Full-Sky Maps of the VHF Radio Sky with the Owens Valley Radio Observatory Long Wavelength Array, English
Publication Type :
Electronic Resource
Accession number :
edsoai.on1091067479
Document Type :
Electronic Resource