Tracing mergers in time

Elisa Tau
  • 15 Feb

Hello again!

I am trying to study the evolution of some galaxies and, to do so, I am analysing their merger trees. I calculated the number of mergers they have had during their evolution history and now I would like to find out at which epoch did they occur. Is it possible to trace these mergers to a specific redshift? If so, how can I do this?

Many thanks in advance.
Elisa.

Dylan Nelson
  • 16 Feb

A previous question might be useful here.

Elisa Tau
  • 16 Feb

Thank you, Dylan!

I did the API request for the "sublink/simple.json" and used the 'Mergers' field to analyse the subhalos mergers. However, I don't think I understand the return I got because, for example, for the subhalo with ID=11 at z=0 I got as the first element of the list "[80, 20419]". Does that mean that in the 80th snapshot it had 20419 mergers? Isn't it an enormous amount of mergers for one subhalo to have at only one snapshot?

Dylan Nelson
  • 16 Feb

Hi Elisa,

You can find a description of what the return value is in the API documentation (search for "simple.json").

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