I am want to determine/define when exactly a merger begins / is officially merged. Is this defined within the simulation - how do I extract this If it's feasible? I would appreciate insight as to how this has been done or if this has already been defined within the simulation. I am using TNG300-1. I realize I can plot sub halo mass over snapshot in order to see where the downward trend in mass followed by a sudden increase in the plot indicates a merger - I am wondering if there are any other ways?
Dylan Nelson
16 Nov
You can define the time of a merger in many different ways, it is up to you (and the science question).
The "LHaloTree" and "SubLink" merger trees, both being based on the Subfind catalogs, adopt the concept that a merger occurs when the (secondary) subhalo no longer exists.
I am want to determine/define when exactly a merger begins / is officially merged. Is this defined within the simulation - how do I extract this If it's feasible? I would appreciate insight as to how this has been done or if this has already been defined within the simulation. I am using TNG300-1. I realize I can plot sub halo mass over snapshot in order to see where the downward trend in mass followed by a sudden increase in the plot indicates a merger - I am wondering if there are any other ways?
You can define the time of a merger in many different ways, it is up to you (and the science question).
The "LHaloTree" and "SubLink" merger trees, both being based on the Subfind catalogs, adopt the concept that a merger occurs when the (secondary) subhalo no longer exists.