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Major mergers going Notts: challenges for modern halo finders
2015
Monthly notices of the Royal Astronomical Society
Merging haloes with similar masses (i.e., major mergers) pose significant challenges for halo finders. We compare five halo finding algorithms' (AHF, HBT, Rockstar, SubFind, and VELOCIraptor) recovery of halo properties for both isolated and cosmological major mergers. We find that halo positions and velocities are often robust, but mass biases exist for every technique. The algorithms also show strong disagreement in the prevalence and duration of major mergers, especially at high redshifts
doi:10.1093/mnras/stv2046
fatcat:v7avrin4tjc37ckhirlt2w2dk4