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arxiv: 2109.13755 · v2 · pith:VPVSO67Gnew · submitted 2021-09-28 · 🌌 astro-ph.IM · astro-ph.CO

The Hydrogen Intensity and Real-time Analysis eXperiment: 256-Element Array Status and Overview

Devin Crichton , Moumita Aich , Adam Amara , Kevin Bandura , Bruce A. Bassett , Carlos Bengaly , Pascale Berner , Shruti Bhatporia
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Martin Bucher Tzu-Ching Chang H. Cynthia Chiang Jean-Francois Cliche Carolyn Crichton Romeel Dave Dirk I. L. de Villiers Matt A. Dobbs Aaron M. Ewall-Wice Scott Eyono Christopher Finlay Sindhu Gaddam Ken Ganga Kevin G. Gayley Kit Gerodias Tim Gibbon Austin Gumba Neeraj Gupta Maile Harris Heiko Heilgendorf Matt Hilton Adam D. Hincks Pascal Hitz Mona Jalilvand Roufurd Julie Zahra Kader Joseph Kania Dionysios Karagiannis Aris Karastergiou Kabelo Kesebonye Piyanat Kittiwisit Jean-Paul Kneib Kenda Knowles Emily R. Kuhn Martin Kunz Roy Maartens Vincent MacKay Stuart MacPherson Christian Monstein Kavilan Moodley V. Mugundhan Warren Naidoo Arun Naidu Laura B. Newburgh Viraj Nistane Amanda Di Nitto Deniz \"Ol\c{c}ek Xinyu Pan Sourabh Paul Jeffrey B. Peterson Elizabeth Pieters Carla Pieterse Aritha Pillay Anna R. Polish Liantsoa Randrianjanahary Alexandre Refregier Andre Renard Edwin Retana-Montenegro Ian H. Rout Cyndie Russeeawon Alireza Vafaei Sadr Benjamin R.B. Saliwanchik Ajith Sampath Pranav Sanghavi Mario G. Santos Onkabetse Sengate J. Richard Shaw Jonathan L. Sievers Oleg M. Smirnov Kendrick M. Smith Ulrich Armel Mbou Sob Raghunathan Srianand Pieter Stronkhorst Dhaneshwar D. Sunder Simon Tartakovsky Russ Taylor Peter Timbie Emma E. Tolley Junaid Townsend Will Tyndall Cornelius Ungerer Jacques van Dyk Gary van Vuuren Keith Vanderlinde Thierry Viant Anthony Walters Jingying Wang Amanda Weltman Patrick Woudt Dallas Wulf Anatoly Zavyalov Zheng Zhang
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keywords arrayelementexperimenthiraxhydrogenintensityradiowill
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The Hydrogen Intensity and Real-time Analysis eXperiment (HIRAX) is a radio interferometer array currently in development, with an initial 256-element array to be deployed at the South African Radio Astronomy Observatory (SARAO) Square Kilometer Array (SKA) site in South Africa. Each of the 6m, $f/0.23$ dishes will be instrumented with dual-polarisation feeds operating over a frequency range of 400-800 MHz. Through intensity mapping of the 21 cm emission line of neutral hydrogen, HIRAX will provide a cosmological survey of the distribution of large-scale structure over the redshift range of $0.775 < z < 2.55$ over $\sim$15,000 square degrees of the southern sky. The statistical power of such a survey is sufficient to produce $\sim$7 percent constraints on the dark energy equation of state parameter when combined with measurements from the Planck satellite. Additionally, HIRAX will provide a highly competitive platform for radio transient and HI absorber science while enabling a multitude of cross-correlation studies. In this paper, we describe the science goals of the experiment, overview of the design and status of the sub-components of the telescope system, and describe the expected performance of the initial 256-element array as well as the planned future expansion to the final, 1024-element array.

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