The Profile of the Galactic Halo from Pan-STARRS1 3π RR Lyrae
The Profile of the Galactic Halo from Pan-STARRS1 3π RR Lyrae
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 of 44,403 sources spans Galactocentric radii of $0.55 \; \mathrm{kpc} \leq R_{\mathrm{gc}} \leq 141 \; \mathrm{kpc}$ with a distance …