21cmfast: a fast, seminumerical simulation of the high‐redshift 21‐cm signal
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TLDR
21cmFAST as discussed by the authors is a semi-numeric modeling tool designed to simulate the cosmological 21-cm signal, which can be used to compute the brightness temperature.Abstract:
We introduce a powerful semi-numeric modeling tool, 21cmFAST, designed to efficiently simulate the cosmological 21-cm signal. Our code generates 3D realizations of evolved density, ionization, peculiar velocity, and spin temperature fields, which it then combines to compute the 21-cm brightness temperature. Although the physical processes are treated with approximate methods, we compare our results to a state-of-the-art large-scale hydrodynamic simulation, and find good agreement on scales pertinent to the upcoming observations (>~ 1 Mpc). The power spectra from 21cmFAST agree with those generated from the numerical simulation to within 10s of percent, down to the Nyquist frequency. We show results from a 1 Gpc simulation which tracks the cosmic 21-cm signal down from z=250, highlighting the various interesting epochs. Depending on the desired resolution, 21cmFAST can compute a redshift realization on a single processor in just a few minutes. Our code is fast, efficient, customizable and publicly available, making it a useful tool for 21-cm parameter studies.read more
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Hydrogen epoch of reionization array (HERA)
David DeBoer,Aaron R. Parsons,James E. Aguirre,Paul Alexander,Zaki S. Ali,Adam P. Beardsley,Gianni Bernardi,Judd D. Bowman,Richard F. Bradley,Chris L. Carilli,Carina Cheng,Eloy de Lera Acedo,Joshua S. Dillon,Aaron Ewall-Wice,Gcobisa Fadana,Nicolas Fagnoni,Randall Fritz,Steve R. Furlanetto,Brian Glendenning,Bradley Greig,Jasper Grobbelaar,Bryna J. Hazelton,Jacqueline N. Hewitt,Jack Hickish,Daniel C. Jacobs,Austin Julius,MacCalvin Kariseb,Saul A. Kohn,Telalo Lekalake,Adrian Liu,Anita Loots,David MacMahon,Lourence Malan,Cresshim Malgas,Matthys Maree,Zachary E. Martinot,Nathan Mathison,Eunice Matsetela,Andrei Mesinger,Miguel F. Morales,Abraham R. Neben,Nipanjana Patra,Samantha Pieterse,Jonathan C. Pober,Nima Razavi-Ghods,Jon Ringuette,James Robnett,Kathryn Rosie,Raddwine Sell,C. H. Smith,Angelo Syce,Max Tegmark,Nithyanandan Thyagarajan,Peter Williams,Haoxuan Zheng +54 more
TL;DR: 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; Acedo, Eloy de Lera; Dillon, Joshua S; Ewall-Wice, Aaron; Fadana, Gcobisa; Fagnoni, Nicolas; Fritz, Randall; Furlanetto, Steve R; Glenden
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