2019/04/05 by Ben Hodkinson, Jakub Scholtz
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Current (fluid) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy formation and evolution #Geometry #Line (geometry) #Line-of-sight #Physics #Plane (geometry) #Satellite #Satellite galaxy #Stellar, planetary, and galactic studies #astro-ph.GA #hep-ph
paper · pdf · doi:10.1093/mnras/stz1893
9 pages, 2 figures, 1 table
arxiv created 2019/04/05 · openalex publication_date 2019/07/09 · arxiv updated 2019/07/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract We predict the range of proper motions of 19 satellite galaxies of M31 that would rotationally stabilize the M31 plane of satellites consisting of 15–20 members as identified by Ibata et al. Our prediction is based purely on the current positions and line-of-sight velocities of these satellites and the assumption that the plane is not a transient feature. These predictions are therefore independent of the current debate about the formation history of this plane. We further comment on the feasibility of measuring these proper motions with future observations by the THEIA satellite mission as well as the currently planned observations by HST and JWST.