which stellar mass ?

Lingjian Chen
  • 22 Oct '19


I am interested i using stellar mass as a criterion to select subhalos (galaxies) to compare with some observation. I found that for Subfind subhalos, there are two fields that can be interpreted as stellar mass:

'SubhaloMassType' for type4 AND 'SubhaloStellarPhotometricsMassInRad'

I was wondering which one is better to use?


Dylan Nelson
  • 23 Oct '19

Hi Lingjian,

You're right there are many possible definitions/measurements of stellar mass. In general, you should use (or create) the one which is as close as possible to the observations.

In general, as a starting point, we recommend SubhaloMassInRadType[4].

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