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 Paraíba, Brazil and consists of two \thicksim 40m mirrors, a feedhorn array of 50 horns, and no moving parts, working as a drift-scan instrument. It will cover a 15 ^{\circ} ∘ declination strip centered at \sim \delta ∼ δ =-15 ^{\circ} ∘ , mapping \sim ∼ 5400 square degrees in the sky. The BINGO consortium is led by University of São 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.
Highlights
One of the main cosmological challenges in the 21st century is to explain the present acceleration in the expansion of the universe, first unequivocally inferred in 1998 by two independent groups measuring supernovae of type Ia, one led by S
This led to the 2011 Nobel Prize in Physics and can be explained by postulating a negative pressure from a new component, the so-called Dark Energy
In the context of the standard cosmological model (ΛCDM model), Baryonic Acoustic Oscillations (BAO) can be identified as a small but detectable excess of galaxies with separations of order of 150 Mpc.h-1 (Eisenstein et al 2005, Anderson et al 2014, Planck Collaboration et al 2018). This excess is the imprint of the acoustic oscillations generated during Cosmic Microwave Background (CMB) times and its linear scale is known from basic physics
Summary
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. WUENSCHE, ELCIO ABDALLA, FILIPE ABDALLA, LUCIANO BAROSI, BIN WANG, RUI AN, JOÃO A.M. BARRETOS, RICHARD BATTYE, FRANCISCO A. BRITO, IAN BROWNE, DANIEL CORREIA, ANDRÉ A. COSTA, JACQUES DELABROUILLE, CLIVE DICKINSON, CHANG FENG, ELISA G. LANDIM, VINCENZO LICCARDO, YIN-ZHE MA, TELMO MACHADO, BRUNO MAFFEI, ALESSANDRO MARINS, MILENA M. QUEIROZ, CHRISTOPHER RADCLIFFE, MATHIEU REMAZEILLES, RAFAEL M. SILVA, FREDERICO VIEIRA, JORDANY VIEIRA, THYRSO VILLELA, LINFENG XIAO, WEIQIANG YANG, JIAJUN ZHANG, XUE ZHANG & ZENGHAO ZHU
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