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THE MOST DISTANT STARS IN THE MILKY WAY
2014
Astrophysical Journal Letters
We report on the discovery of the most distant Milky Way (MW) stars known to date: ULAS J001535.72+015549.6 and ULAS J074417.48+253233.0. These stars were selected as M giant candidates based on their infrared and optical colors and lack of proper motions. We spectroscopically confirmed them as outer halo giants using the MMT/Red Channel spectrograph. Both stars have large estimated distances, with ULAS J001535.72+015549.6 at 274 ± 74 kpc and ULAS J074417.48+253233.0 at 238 ± 64 kpc, making
doi:10.1088/2041-8205/790/1/l5
fatcat:kob2yqxcsvg2ffynqoytwbzb4u