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Connecting the Milky Way potential profile to the orbital timescales and spatial structure of the Sagittarius Stream
Mark A. Fardal, Roeland P. van der Marel, David R. Law +4
Recent maps of the halo using RR Lyrae from Pan-STARRS1 have clearly depicted the spatial structure of the Sagittarius stream. These maps show the leading and trailing stream apoce…
Two chemically similar stellar overdensities on opposite sides of the plane of the Galaxy
Maria Bergemann, Branimir Sesar, Judith G. Cohen +9
Our Galaxy is thought to have undergone an active evolutionary history dominated by star formation, the accretion of cold gas, and, in particular, mergers up to 10 gigayear ago. Th…
A Disk Origin for the Monoceros Ring and A13 Stellar Overdensities
Allyson A. Sheffield, Adrian M. Price-Whelan, Anastasios Tzanidakis +3
The Monoceros Ring (also known as the Galactic Anticenter Stellar Structure) and A13 are stellar overdensities at estimated heliocentric distances of kpc and 15 kpc obs…
The Profile of the Galactic Halo from Pan-STARRS1 3 RR Lyrae
Nina Hernitschek, Judith G. Cohen, Hans-Walter Rix +11
We characterize the spatial density of the Pan-STARRS1 (PS1) sample of RR Lyrae stars, to study the properties of the old Galactic stellar halo as traced by RRab stars. This sample…