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Paper: The Ultra-Low Density Galactic Companion Crater II and Its RR Lyrae Stars
Volume: 529, RR Lyrae/Cepheid 2019: Frontiers of Classical Pulsators
Page: 163
Authors: Walker, A. R.
Abstract: Crater II is a recently discovered companion galaxy to the Milky Way that further pushes into the little-explored regime of low surface-brightness parameter space for nearby low-mass galaxies frequenting the Galactic halo. With the discovery of many such Galactic companions, the Galactic halo has become a laboratory for learning about the star formation and chemical evolution history, dark matter content, and structural evolution with time of low mass galaxies. Crater II contains over 100 short-period variable stars, mostly RR Lyraes. We highlight some of the properties of the variables, summarize what can be deduced about the history of Crater II, and outline future work to address the various unknowns that remain to be explained for this interesting galaxy.
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