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Hydrogen Intensity and Real-Time Analysis Experiment: 256-element array status and overview

2022; SPIE; Volume: 8; Issue: 01 Linguagem: Inglês

10.1117/1.jatis.8.1.011019

2329-4221

Devin Crichton, Moumita Aich, A. Amara, Kevin Bandura, Bruce A. Bassett, Carlos A. P. Bengaly, Pascale Berner, Shruti Bhatporia, M. Bucher, Tzu‐Ching Chang, H. C. Chiang, J.-F. Cliche, Carolyn Crichton, Romeel Davé, Dirk I. L. de Villiers, M. Dobbs, Aaron Ewall‐Wice, Scott Eyono, Chris Finlay, Sindhu Gaddam, K. Ganga, Kevin G. Gayley, Kit Gerodias, T. B. Gibbon, Austine Gumba, N. Gupta, Maile Harris, H M Heilgendorff, Matt Hilton, Adam D. Hincks, Pascal Hitz, Mona Jalilvand, Roufurd Julie, Zahra Kader, Joseph Kania, Dionysios Karagiannis, A. Karastergiou, Kabelo C. Kesebonye, Piyanat Kittiwisit, Jean‐Paul Kneib, Kenda Knowles, Emily Kuhn, M. Kunz, Roy Maartens, Vincent MacKay, Stuart MacPherson, C. Monstein, Kavilan Moodley, V. Mugundhan, Warren Naidoo, Arun Naidu, Laura Newburgh, Viraj Nistane, Amanda Di Nitto, Deniz Ölçek, Xinyu Pan, Sourabh Paul, J. B. Peterson, Elizabeth Pieters, Carla Pieterse, Aritha Pillay, Anna Rose Polish, Liantsoa F. Randrianjanahary, Alexandre Réfrégier, Andre Renard, E. Retana-Montenegro, Ian H. Rout, Cyndie Russeeawon, Alireza Vafaei Sadr, B. R. Saliwanchik, Ajith Sampath, Pranav Sanghavi, Mário G. Santos, Onkabetse Sengate, J. Richard Shaw, Jonathan Sievers, O. Smirnov, Kendrick M. Smith, Ulrich Armel Mbou Sob, R. Srianand, P. Stronkhorst, Dhaneshwar D. Sunder, Simon Tartakovsky, Russ Taylor, Peter T. Timbie, E. Tolley, Junaid Townsend, Will Tyndall, Cornelius Ungerer, Jacques van Dyk, Gary van Vuuren, K. Vanderlinde, T. Viant, Anthony Walters, Jingying Wang, Amanda Weltman, P. A. Woudt, Dallas Wulf, Anatoly Zavyalov, Zheng Zhang,

Pulsars and Gravitational Waves Research

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.