Simulations

Files

https://www.cfa.harvard.edu/~bdiemer/illustris/stellarmaps/

• all files: 300x300 pixels
• orig = old Illustris; tng75 = TNG100; tng205 = TNG300 (75 and 205 are in Mpc/h units)
• highres = 1 kpc/pixel (300x300 kpc); else 5.33 kpc/pixel (1.6x1.6 Mpc)

Pixel scale

• stellar_map_size (previously called map_stars_size) indicates the physical length on EACH side of the center. i.e. 300kpc means 600x600 kpc map
• stellar_map_np (previously called map_stars_npixel) indicates the number of pixels in each dimension i.e. 200 pixels means 200x200 pixel map
• therefore, pixel scale = 2*stellar_map_size/stellar_map_np
• for galaxies_orig_11.2.hdf5, pixel scale = 5.0 kpc/pixel, stellar_map_size = 500., stellar_map_np = 200
• quick_800 maps : 2 * (800 kpc / 300 pixels)

New naming scheme

• The names are prefix (catsh_ and so on) plus the original catalog names: http://www.illustris-project.org/data/docs/specifications/
• catalog mass: catsh_SubhaloMassType[:, 4]
• oshs stands for “other subhalos”, as opposed to bound particles (no suffix) and fuzz (unbound particles)

Illustris

http://www.illustris-project.org/data/docs/specifications/

• 339 galaxies with log(M)>11.2
• 2 galaxies raised error in fitting isophotes (9 and 142)
• color = u'#d62728'

TNG

• 235 galaxies with log(M)>11.2
• 2 galaxies raised error in fitting isophotes (26 and 109)
• for galaxies_tng75_11.2.hdf5, pixel scale = 5.0 kpc/pixel
• color = u'#1f77b4'