Adding routines for matter Pk using AMReX FFT#110
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nataraj2 wants to merge 4 commits intoAMReX-Astro:developmentfrom
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Adding routines for matter Pk using AMReX FFT#110nataraj2 wants to merge 4 commits intoAMReX-Astro:developmentfrom
nataraj2 wants to merge 4 commits intoAMReX-Astro:developmentfrom
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This PR adds the routines to compute the matter power spectrum using AMReX FFT feature. As FFT is involved, only a single level mesh is supported.
Use
amr.derive_plot_vars = particle_mass_densityin theinputs. During the run, a directory namedMatterPkwill be created with the power spectrum written (at the same frequency as the plot files) into text files (.txt) that contain two columns -k [h/Mpc]andPk [(Mpc/h)^3].The images show the comparison of power spectrum at$z=200$ (initial condition) - theoretical, Gimlet and Nyx, for cold, warm, and fuzzy dark matter. The domain size is $20~\text{Mpc h}^{-1}$ with $512^3$ mesh cells
The images below show the comparison of the spectrum for CDM and WDM, and CDM and FDM.