HEALPix map directory layout

Each FLAMINGO simulation has a directory healpix_maps which contains the HEALPix map data. Maps are available at two resolutions:

• Full resolution maps with \(N_\mathrm{side}=16384\) in the directory nside_16384

• Lower resolution maps with \(N_\mathrm{side}=4096\) in the directory nside_4096

Within these directories there is one directory lightconeX_shells for each observer X. Each of the observer directories contains files lightconeX_shell_Y.0.hdf5 with the map data for shell Y.

This layout is illustrated below. We show the nside_16384 directory here but the structure is the same for both resolutions.

        flowchart LR
  hm["`**Full resolution maps**
  healpix_maps/nside_16384/`"]

  hm --> hr_obs0["`**Observer 0**
  lightcone0_shells/`"]
  hm --> hr_obs1["`**Observer 1**
  lightcone1_shells/`"]

  hr_obs0 --> hr_files0_0["`**Shell 0 for observer 0**
  lightcone0.shell_0.0.hdf5`"]
  hr_obs0 --> hr_files0_1["`**Shell 1 for observer 0**
  lightcone0.shell_1.0.hdf5`"]
  hr_obs0 --> hr_files0_2["`**Shell 2 for observer 0**
  lightcone0.shell_2.0.hdf5`"]

  hr_obs1 --> hr_files1_0["`**Shell 0 for observer 1**
  lightcone1.shell_0.0.hdf5`"]
  hr_obs1 --> hr_files1_1["`**Shell 1 for observer 1**
  lightcone1.shell_1.0.hdf5`"]
  hr_obs1 --> hr_files1_2["`**Shell 2 for observer 1**
  lightcone1.shell_2.0.hdf5`"]
    

As an example, see /FLAMINGO/L1_m9/L1_m9/healpix_maps/ for the L1_m9 HEALPix maps.