Group_M_Crit200 defination

Da Bi
  • 20 May '19

I have a question about the defination of "Group_M_Crit200" in FOF catalog. The documents said it is "Total Mass of this group enclosed in a sphere whose mean density is 200 times the critical density of the Universe, at the time the halo is considered." So is the total mass mean all type of particles' total mass, or just DM particles' total mass?

Da Bi

Dylan Nelson
  • 22 May '19


It should be the "total" of all particles types - this you could verify at least for one halo, searching for all particles of all types within Group_R_Crit200.

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