The Distance to the Sagittarius Dwarf Galaxy and its Relation to M54 using Infrared Photometry of RR Lyrae Variable Stars

Arvind Gupta
The Sagittarius dwarf galaxy (Sgr) is among the most massive satellites of the Milky Way and is unique due to its extensive tails of tidally stripped stars. Models of these tails provide strong constraints on the orbital history of Sgr, which in turn lend insight into the structure of the Milky Way’s dark matter halo. Fully understanding the dynamics of Sgr, however, relies on a precise distance to the core. Yet past measurements yield a...
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