Dynamical History Of The Local Group In $\Lambda$CDM $\mathrm{II}$ $-$ Including External Perturbers In 3D

Indranil Banik, Hongsheng Zhao

We attempt to fit the observed radial velocities (RVs) of $\sim 30$ Local Group (LG) galaxies using a 3D dynamical model of it and its immediate environment within the conte…