Minimum number of particles to obtain averages

Justo Antonio Gonzalez Villalba
  • 21 Feb

Should I apply a limit on the minimum number of particles to obtain average values from a particular region of the simulation (e.g. a radial bin in a temperature profile)?

Or should I just apply a scale limit based on the resolution of the simulation? (e.g. minim radial bin has 10kpc radius)

This question comes because I understand that the gas particles are in reality tracer particles, which already represent an average, so I wonder if such limit on the minimum number of particles to obtain average values is necessary.

Thank you very much in advance!

Dylan Nelson
  • 22 Feb

A general answer isn't possible, it depends on what you're doing. If you are ever binning, you (usually) want the bins to be large enough to contain many particles/cells, so that you get a reasonably (non-noisy) average.

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