Proper Motions of Local Group Satellites

Mike Irwin
1999 Symposium - International astronomical union  
Many direct attempts to measure the proper motions of Galactic satellite galaxies are either in progress or have recently been completed. In this review I will summarise and examine the current state of knowledge in this field and will also highlight several indirect methods that can be used as alternative estimators or constraints on the proper motions of satellite galaxies throughout the Local Group. A good example of this latter approach is provided by the Sagittarius dwarf galaxy, where
more » ... f galaxy, where ongoing tidal disruption of the system has left a giant arc of debris tracing out its orbital path.
doi:10.1017/s0074180900204439 fatcat:eukpo2w5dfbvdldvxh6mjpsy24