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Magellanic Mayhem: Metallicities and Motions

  • Authors: J. Grady, V. Belokurov, and N. W. Evans

2021 The Astrophysical Journal 909 150.

  • Provider: AAS Journals

Caption: Figure 15.

In the top panels, we show the reflex-corrected, mean μL in three metallicity bins M1, M2, and M3 as in Figure 14. The lower panels show the respective dispersion in each pixel. The LMC displays a coherent rotation signal across all the metallicity bins, with the two outer arms appearing to lag somewhat behind the inner disk. The SMC shows a gradient in its motion, with the edge nearest the LMC displaying prominent motion toward the larger Cloud. The greatest dispersion in the motion of the giants appears in the metal-poorest bin at the interface between the Clouds—a region where we expect mixing of stellar populations and turbulent motion due to tidal interactions within the system. The central-most region of the LMC, in the vicinity of the bar and spiral arm, is mildly visible as a region of enhanced dispersion.

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