PORTRAIT OF A DARK HORSE: A PHOTOMETRIC AND SPECTROSCOPIC STUDY OF THE ULTRA-FAINT MILKY WAY SATELLITE PEGASUS III

@article{Kim2016PORTRAITOA,
  title={PORTRAIT OF A DARK HORSE: A PHOTOMETRIC AND SPECTROSCOPIC STUDY OF THE ULTRA-FAINT MILKY WAY SATELLITE PEGASUS III},
  author={Dongwon Kim and Helmut Jerjen and Marla Geha and Anirudh Chiti and Antonino P. Milone and Gary S. Da Costa and Dougal Mackey and Anna Frebel and Blair C. Conn},
  journal={The Astrophysical Journal},
  year={2016},
  volume={833},
  pages={16}
}
Pegasus III (Peg III) is one of the few known ultra-faint stellar systems in the outer halo of the Milky Way. We present the results from a follow-up campaign with Magellan/IMACS and Keck/DEIMOS. Deep stellar photometry down to $r_0\approx 25$ mag at 50% completeness level has allowed accurate measurements of its photometric and structural properties. The color-magnitude diagram of Peg III confirms that the stellar system is well described by an old ($\gtrsim12$ Gyr) and metal-poor ([Fe/H… 

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