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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/27308
Title: Hydrogen Epoch of Reionization Array (HERA)
Authors: DeBoer, David R.
Parsons, Aaron R.
Aguirre, James E.
Alexander, Paul
Ali, Zaki S.
Beardsley, Adam P.
BERNARDI, GIANNI 
Bowman, Judd D.
Bradley, Richard F.
Carilli, Chris L.
Cheng, Carina
de Lera Acedo, Eloy
Dillon, Joshua S.
Ewall-Wice, Aaron
Fadana, Gcobisa
Fagnoni, Nicolas
Fritz, Randall
Furlanetto, Steve R.
Glendenning, Brian
Greig, Bradley
Grobbelaar, Jasper
Hazelton, Bryna J.
Hewitt, Jacqueline N.
Hickish, Jack
Jacobs, Daniel C.
Julius, Austin
Kariseb, MacCalvin
Kohn, Saul A.
Lekalake, Telalo
Liu, Adrian
Loots, Anita
MacMahon, David
Malan, Lourence
Malgas, Cresshim
Maree, Matthys
Martinot, Zachary
Mathison, Nathan
Matsetela, Eunice
Mesinger, Andrei
Morales, Miguel F.
Neben, Abraham R.
Patra, Nipanjana
Pieterse, Samantha
Pober, Jonathan C.
Razavi-Ghods, Nima
Ringuette, Jon
Robnett, James
Rosie, Kathryn
Sell, Raddwine
Smith, Craig
Syce, Angelo
Tegmark, Max
Thyagarajan, Nithyanandan
Williams, Peter K. G.
Zheng, Haoxuan
Issue Date: 2017
Journal: PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 
Number: 129
Issue: 974
First Page: 045001
Abstract: The Hydrogen Epoch of Reionization Array (HERA) is a staged experiment to measure 21 cm emission from the primordial intergalactic medium (IGM) throughout cosmic reionization (z = 6-12), and to explore earlier epochs of our Cosmic Dawn (z ∼ 30). During these epochs, early stars and black holes heated and ionized the IGM, introducing fluctuations in 21 cm emission. HERA is designed to characterize the evolution of the 21 cm power spectrum to constrain the timing and morphology of reionization, the properties of the first galaxies, the evolution of large-scale structure, and the early sources of heating. The full HERA instrument will be a 350-element interferometer in South Africa consisting of 14 m parabolic dishes observing from 50 to 250 MHz. Currently, 19 dishes have been deployed on site and the next 18 are under construction. HERA has been designated as an SKA Precursor instrument. In this paper, we summarize HERA’s scientific context and provide forecasts for its key science results. After reviewing the current state of the art in foreground mitigation, we use the delay-spectrum technique to motivate high-level performance requirements for the HERA instrument. Next, we present the HERA instrument design, along with the subsystem specifications that ensure that HERA meets its performance requirements. Finally, we summarize the schedule and status of the project. We conclude by suggesting that, given the realities of foreground contamination, current-generation 21 cm instruments are approaching their sensitivity limits. HERA is designed to bring both the sensitivity and the precision to deliver its primary science on the basis of proven foreground filtering techniques, while developing new subtraction techniques to unlock new capabilities. The result will be a major step toward realizing the widely recognized scientific potential of 21 cm cosmology.
URI: http://hdl.handle.net/20.500.12386/27308
URL: https://iopscience.iop.org/article/10.1088/1538-3873/129/974/045001
ISSN: 0004-6280
DOI: 10.1088/1538-3873/129/974/045001
Bibcode ADS: 2017PASP..129d5001D
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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PASP1606.07473.pdfpostprint13.49 MBAdobe PDFView/Open
DeBoer17.pdf[Administrators only]5.21 MBAdobe PDF
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