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- W1921567268 abstract "We introduce a powerful seminumeric modelling 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 per cent, 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." @default.
- W1921567268 created "2016-06-24" @default.
- W1921567268 creator A5019025722 @default.
- W1921567268 creator A5070588335 @default.
- W1921567268 creator A5071294469 @default.
- W1921567268 date "2010-11-11" @default.
- W1921567268 modified "2023-10-17" @default.
- W1921567268 title "21cmfast: a fast, seminumerical simulation of the high-redshift 21-cm signal" @default.
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- W1921567268 doi "https://doi.org/10.1111/j.1365-2966.2010.17731.x" @default.
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