The Variety of Solutions for Dynamics in the Local Group

Abstract

This exploration of solutions for the orbits of Local Group galaxies under the cosmological initial condition of growing peculiar velocities and fitted to measured distances, redshifts, and proper motions reveals a considerable variety of histories allowed by present constraints. The solutions also point to computations and measurements at the current level of precision that may lead to a more accurate picture of Local Group dynamics, or perhaps point to adjustments of our simple picture of the arrangement of mass within the Local Group.

arXiv comment21 pages, 12 figures, to be submitted to the Astrophysical Journal

References in corpus (3)

• The Space Motion of Leo I: Hubble Space Telescope Proper Motion and Implied Orbit
• A Dynamical Model of the Local Group
• Orbit of the Large Magellanic Cloud in a Dynamical Model for the Local Group

Cited by in corpus (8)

• The Galaxy in Context: Structural, Kinematic and Integrated Properties
• The Formation of the Local Group Planes of Galaxies
• Dynamical History Of The Local Group In $\Lambda$CDM $\mathrm{II}$ $-$ Including External Perturbers In 3D
• Dynamics of the Local Group: the Dwarf Galaxies
• A Primeval Magellanic Stream and Others
• Local Group timing in Milgromian dynamics. A past Milky Way-Andromeda encounter at z>0.8
• Distinguishing Standard from Modified Gravity in the Local Group and beyond
• Accretion History of the Milky Way Dark Matter Halo and the Origin of its Angular Momentum