Princeton University Thunch Talk - SPEAKER'S NAME CORRECTED

Mapping the Milky Way stellar halo is of scientific interest because its substructure provides us with valuable information to reconstruct the merger history of our galaxy and infer its gravitational potential. The SDSS photometric survey was very successful in mapping the halo to ~30 kpc over ~8000 deg^2 with color-selected main-sequence turnoff stars with a magnitude limit of r<22.5. With a magnitude limit of r<26 in its wide survey, Hyper Suprime-Cam (HSC) will detect individual main-sequence turnoff stars to ~100 kpc over 1,400 deg^2. If stars and galaxies are cleanly separated at the faintest magnitudes, HSC will be able to map the halo significantly farther than ever before. I'll describe our work on star/galaxy separation and its implications for studies of the halo with HSC.