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- W3101891036 abstract "Dwarf spheroidal galaxies (dSph) orbiting the Milky Way are complex objects often with complicated star formation histories and internal dynamics. In this work, we search for stellar substructures in four of the classical dSph satellites of the Milky Way: Sextans, Carina, Leo I, and Leo II. We apply two methods to search for stellar substructure: the minimum spanning tree method, which helps us to find and quantify spatially connected structures, and the brute-force method, which is able to find elongated stellar substructures. We detected the previously known substructure in Sextans, and also found a new stellar substructure within Sextans. Furthermore, we identified a new stellar substructure close to the core radius of the Carina dwarf galaxy. We report a detection of one substructure in Leo I and two in Leo II, but we note that we are dealing with a low number of stars in the samples used. Such old stellar substructures in dSph galaxies could help us to shed light on the nature of the dark matter halos, within which such structures form, evolve, and survive." @default.
- W3101891036 created "2020-11-23" @default.
- W3101891036 creator A5030210987 @default.
- W3101891036 creator A5035080573 @default.
- W3101891036 creator A5046542505 @default.
- W3101891036 creator A5078521670 @default.
- W3101891036 date "2019-06-24" @default.
- W3101891036 modified "2023-10-11" @default.
- W3101891036 title "Cold, Old, and Metal-poor: New Stellar Substructures in the Milky Way’s Dwarf Spheroidals" @default.
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- W3101891036 doi "https://doi.org/10.3847/1538-4357/ab1b71" @default.
- W3101891036 hasPublicationYear "2019" @default.
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