Weird Harmonic Artifacts

[levi2234]

Astrometric Halo Merger artifacts

While applying the Multipole Expansion on a set of 2 Gaussian distributed clusters I encountered a weird artifact dependent on the value of L_min. When the Gaussian cluster has a separation of multiple cluster standard deviations a deep potential well occurs exactly between the two clusters. As the clusters move inward this well resolves itself. I would like to know if this is a problem that should be adressed or if it is expected behaviour. If it is the latter I think I must look to some other solution.

To sketch the problem I have included a video mock collision for multiple modes for both haloes and single points. As a reference I have also included an discrete example of what I would expect the potential field to look like.

HaloCollisionMultipoleEvolution_l_max_4.mp4

HaloCollisionMultipoleEvolution_l_max_8.mp4

HaloCollisionMultipoleEvolution_l_max_12.mp4

two_particles.test.12.mp4

two_particles.test.mp4

HaloCollisionDiscreteEvolution.mp4

HaloCollisionMultipoleEvolution_l_max_1.mp4

HaloCollisionMultipoleEvolution_l_max_2.mp4

HaloCollisionMultipoleEvolution_l_max_3.mp4