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arXiv · 2106.02107

Baryon Acoustic Oscillations from Integrated Neutral Gas Observations: an instrument to observe the 21cm hydrogen line in the redshift range 0.13 $<$ z $<$ 0.45 -- status update

Carlos A. Wuensche·Elcio Abdalla·Filipe Batoni Abdalla·Luciano Barosi·Bin Wang·Rui An·João Alberto de Moraes Barreto·Richard Battye·Franciso A. Brito·Ian Browne·Daniel Souza Correia·André Alencar Costa·Jacques Delabrouille·Clive Dickinson·Chang Feng·Elisa Ferreira·Karin Fornazier·Giancarlo de Gasperis·Priscila Gutierrez·Stuart Harper·Ricardo G. Landim·Vincenzo Liccardo·Yin-Zhe Ma·Telmo Machado·Bruno Maffei·Alessandro Marins·Milena Martins Machado Mendes·Eduardo Merícia·Christian Monstein·Pablo Motta·Camila P. Novaes·Carlos Henrique do Nascimento Otobone·Michael Peel·Amilcar Queiroz·Christopher Radcliffe·Mathieu Remazeilles·Rafael M. G. Ribeiro·Yu Sang·Juliana Fernandes Rossi dos Santos·Larissa Santos·Marcelo V. Santos·Chenxi Shan·Gustavo Bezerra Silva·Frederico Vieira·Jordany Vieira·Thyrso Villela·Linfeng Xiao·Weiqiang Yang·Jiajun Zhang·Xue Zhang·Zenghao Zhu
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Abstract

BINGO (BAO from Integrated Neutral Gas Observations) is a unique radio telescope designed to map the intensity of neutral hydrogen distribution at cosmological distances, making the first detection of Baryon Acoustic Oscillations (BAO) in the frequency band 980 MHz - 1260 MHz, corresponding to a redshift range $0.127 < z < 0.449$. BAO is one of the most powerful probes of cosmological parameters and BINGO was designed to detect the BAO signal to a level that makes it possible to put new constraints on the equation of state of dark energy. The telescope will be built in Para\'iba, Brazil and consists of two $\thicksim$ 40m mirrors, a feedhorn array of 28 horns, and no moving parts, working as a drift-scan instrument. It will cover a $15^{\circ}$ declination strip centered at $\sim \delta=-15^{\circ}$, mapping $\sim 5400$ square degrees in the sky. The BINGO consortium is led by University of S\~ao Paulo with co-leadership at National Institute for Space Research and Campina Grande Federal University (Brazil). Telescope subsystems have already been fabricated and tested, and the dish and structure fabrication are expected to start in late 2020, as well as the road and terrain preparation.

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Carlos A. Wuensche, Elcio Abdalla, Filipe Batoni Abdalla, Luciano Barosi, Bin Wang, Rui An, João Alberto de Moraes Barreto, Richard Battye, Franciso A. Brito, Ian Browne, Daniel Souza Correia, André Alencar Costa, Jacques Delabrouille, Clive Dickinson, Chang Feng, Elisa Ferreira, Karin Fornazier, Giancarlo de Gasperis, Priscila Gutierrez, Stuart Harper, Ricardo G. Landim, Vincenzo Liccardo, Yin-Zhe Ma, Telmo Machado, Bruno Maffei, Alessandro Marins, Milena Martins Machado Mendes, Eduardo Merícia, Christian Monstein, Pablo Motta, Camila P. Novaes, Carlos Henrique do Nascimento Otobone, Michael Peel, Amilcar Queiroz, Christopher Radcliffe, Mathieu Remazeilles, Rafael M. G. Ribeiro, Yu Sang, Juliana Fernandes Rossi dos Santos, Larissa Santos, Marcelo V. Santos, Chenxi Shan, Gustavo Bezerra Silva, Frederico Vieira, Jordany Vieira, Thyrso Villela, Linfeng Xiao, Weiqiang Yang, Jiajun Zhang, Xue Zhang, Zenghao Zhu. 2021-06-03. Baryon Acoustic Oscillations from Integrated Neutral Gas Observations: an instrument to observe the 21cm hydrogen line in the redshift range 0.13 $<$ z $<$ 0.45 -- status update. https://doi.org/10.1590/0001-3765202120201096

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