Full-Sky Maps of the VHF Radio Sky with the Owens Valley Radio Observatory Long Wavelength Array. Issue Volume 12:Issue S333(2017) (8th May 2018)

• Record Type: Journal Article
• Authors: Eastwood, Michael W.; Hallinan, Gregg
• Editors: Jelić, V.; van der Hulst, T.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 12:Issue S333(2017)
• Page Start: 110
• Page End: 113
• Publication Date: 2018-05-08
• Subjects: cosmology: early universe, -- ISM: HII regions, -- ISM: supernova remnants, -- techniques: interferometric, -- radio continuum: general; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921317011231
• Languages: English
• ISSNs: 1743-9213

Abstract

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.