Merger Tree Building - galacticusorg/galacticus GitHub Wiki
Below is a flowchart indicating the ingredients of Galacticus merger tree building algorithm. (Galacticus is highly modular - many different ingredients can be included and excluded - this is intended just as a typical example.)
flowchart LR
Builder[<a href='https://github.com/galacticusorg/galacticus/releases/download/bleeding-edge/Galacticus_Physics.pdf#physics.mergerTreeBuilder' style='text-decoration: none'>Builder</a>]
Masses[<a href='https://github.com/galacticusorg/galacticus/releases/download/bleeding-edge/Galacticus_Physics.pdf#physics.mergerTreeBuildMasses' style='text-decoration: none'>Mass Distribution</a>]
Branching[<a href='https://github.com/galacticusorg/galacticus/releases/download/bleeding-edge/Galacticus_Physics.pdf#physics.mergerTreeBranchingProbability' style='text-decoration: none'>Branching Distribution</a>]
Excursion[<a href='https://github.com/galacticusorg/galacticus/releases/download/bleeding-edge/Galacticus_Physics.pdf#physics.excursionSetFirstCrossing' style='text-decoration: none'>Excursion Set Solver</a>]
Controller[<a href='https://github.com/galacticusorg/galacticus/releases/download/bleeding-edge/Galacticus_Physics.pdf#physics.mergerTreeBuildController' style='text-decoration: none'>Controller</a>]
Variance["<a href='https://github.com/galacticusorg/galacticus/releases/download/bleeding-edge/Galacticus_Physics.pdf#physics.cosmologicalMassVariance' style='text-decoration: none'>δ<sub>c</sub>(t)</a>"]
Critical["<a href='https://github.com/galacticusorg/galacticus/releases/download/bleeding-edge/Galacticus_Physics.pdf#physics.criticalOverdensity' style='text-decoration: none'>σ(M)</a>"]
Cosmology[<a href='https://github.com/galacticusorg/galacticus/releases/download/bleeding-edge/Galacticus_Physics.pdf#physics.cosmologyParameters' style='text-decoration: none'>Cosmology</a>]
Resolution[<a href='https://github.com/galacticusorg/galacticus/releases/download/bleeding-edge/Galacticus_Physics.pdf#physics.mergerTreeMassResolution' style='text-decoration: none'>Resolution</a>]
Cosmology --> Builder
Masses --> Builder
Controller --> Builder
Branching --> Controller
Excursion -.-> Branching
Variance --> Builder
Critical --> Builder
Resolution --> Controller