Orbits of dwarf spheroidals in the Milky Way


The orbits of these dwarfs come from Pace, Erkal, and Li (2022, available on the arXiv)
 

Movie: Orbits of 46 dwarf spheroidals given present-day errors

Credit: Denis Erkal (University of Surrey, UK)
Caption: Orbits of the Milky Way's Dwarf Spheroidals over the past 500 million years given present-day observations. See Pace et al. 2022 for more information. The LMC is shown with a large white dot. We show 5 realizations for each dwarf. The image credits for the background Gaia image are ESA/Gaia/DPAC, A. Moitinho / A. F. Silva / M. Barros / C. Barata, University of Lisbon, Portugal; H. Savietto, Fork Research, Portugal. adjustText (10.5281/zenodo.3924114) was used for the placement of the dwarf galaxy names.
 

Movie: Orbits of Milky Way Dwarf Spheroidals assuming Gaia DR5 errors

Credit: Denis Erkal (University of Surrey, UK)
Caption: Orbits of the Milky Way's Dwarf Spheroidals over the past 500 million years given the errors expected from Gaia DR5 (10-year baseline) and 2% distance errors. See Pace et al. 2022 for more information. The LMC is shown with a large white dot. We show 5 realizations for each dwarf. The image credits for the background Gaia image are ESA/Gaia/DPAC, A. Moitinho / A. F. Silva / M. Barros / C. Barata, University of Lisbon, Portugal; H. Savietto, Fork Research, Portugal. adjustText (10.5281/zenodo.3924114) was used for the placement of the dwarf galaxy names.
 

Comparison of uncertainty with current and future errors

Click to zoom in

Credit: Denis Erkal (University of Surrey, UK)
Caption: Gif showing the difference between the current orbital precision and what will be possible with Gaia DR5 and imrpoved distances. See Pace et al. 2022 for more information. The LMC is shown with a large white dot. We show 5 realizations for each dwarf. The image credits for the background Gaia image are ESA/Gaia/DPAC, A. Moitinho / A. F. Silva / M. Barros / C. Barata, University of Lisbon, Portugal; H. Savietto, Fork Research, Portugal. adjustText (10.5281/zenodo.3924114) was used for the placement of the dwarf galaxy names.