21cmFAST: A Fast, Semi-Numerical Simulation of the High-Reds

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21cmFAST: A Fast, Semi-Numerical Simulation of the High-Redshift 21-cm Signal

Post by owlice » Thu Feb 17, 2011 10:47 pm

[c]21cmFAST: A Fast, Semi-Numerical Simulation of the High-Redshift 21-cm Signal[/c][/b]
Abstract: 21cmFAST is a powerful semi-numeric modeling tool designed to efficiently simulate the cosmological 21-cm signal. The 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, the results were compared to a state-of-the-art large-scale hydrodynamic simulation, and the findings indicate 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. Results were shown 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. The code is fast, efficient, customizable and publicly available, making it a useful tool for 21-cm parameter studies.

Credit: Mesinger, Andrei; Furlanetto, Steven; Cen, Renyue

Site: https://github.com/andreimesinger/21cmFAST

Bibcode: 2011ascl.soft02023M

Preferred citation method: https://ui.adsabs.harvard.edu/abs/2007ApJ...669..663M and https://ui.adsabs.harvard.edu/abs/2011MNRAS.411..955M

ID: ascl:1102.023
Last edited by Ada Coda on Sat Sep 07, 2019 1:42 pm, edited 1 time in total.
Reason: Updated code entry.
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