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The Orbital Histories of Magellanic Satellites Using Gaia DR2 Proper Motions by Patel, Ekta; Kallivayalil, Nitya; Garavito-Camargo, Nicolas; Besla, Gurtina; Weisz, Daniel R.; van der Marel, Roeland P.; Boylan-Kolchin, Michael; Pawlowski, Marcel S.; Gómez, Facundo A. is a scholarly article available to read on EtoBox.

What is The Orbital Histories of Magellanic Satellites Using Gaia DR2 Proper Motions about?

With the release of Gaia DR2, it is now possible to measure the proper motions (PMs) of the lowest mass, ultra-faint satellite galaxies in the Milky Way's (MW) halo for the first time. Many of these faint satellites are posited to have been accreted as satellites of the Magellanic Clouds (MCs). Using their 6-dimensional phase space information, we calculate the orbital histories of 13 ultra-faint satellites and five classical dwarf spheroidals in a combined MW+LMC+SMC potential to determine which galaxies are dynamically associated with the MCs. These 18 galaxies are separated into four classes: i.) long-term Magellanic satellites that have been bound to the MCs for at least the last two consecutive orbits around the MCs (Carina 2, Carina 3, Horologium 1, Hydrus 1); ii.) Magellanic satellites that were recently captured by the MCs $<$ 1 Gyr ago (Reticulum 2, Phoenix 2); iii.) MW satellites that have interacted with the MCs (Sculptor 1, Tucana 3, Segue 1); and iv.) MW satellites (Aquarius 2, Canes Venatici 2, Crater 2, Draco 1, Draco 2, Hydra 2, Carina, Fornax, Ursa Minor). Results are reported for a range of MW and LMC masses. Contrary to previous work, we find no dynamical associa

Author

Patel, Ekta; Kallivayalil, Nitya; Garavito-Camargo, Nicolas; Besla, Gurtina; Weisz, Daniel R.; van der Marel, Roeland P.; Boylan-Kolchin, Michael; Pawlowski, Marcel S.; Gómez, Facundo A.

Published

2020

Language

EN