Eight Ultra-faint Galaxy Candidates Discovered in Year Two of the Dark Energy Survey

  title={Eight Ultra-faint Galaxy Candidates Discovered in Year Two of the Dark Energy Survey},
  author={The Des Collaboration A. Drlica-Wagner and Keith C. Bechtol and Eli S. Rykoff and E. Luque and Anna. B. A. Queiroz and Y.-Y. Mao and Risa H. Wechsler and Joshua D. Simon and Bas{\'i}lio Xavier Santiago and Brian Yanny and Eduardo Balbinot and Scott Dodelson and Angelo Fausti Neto and David J. James and T. S. Li and Marcio A. G. Maia and Jennifer L. Marshall and A. Pieres and K. M. Stringer and Alistair R. Walker and Timothy M. C. Abbott and Filipe B. Abdalla and Sahar Allam and Aur{\'e}lien Benoit-L{\'e}vy and Gary M. Bernstein and Emmanuel Bertin and David Brooks and Elizabeth Buckley-Geer and David L. Burke and Aurelio Carnero Rosell and Matias Carrasco Kind and Jorge Carretero and Mart{\'i}n Crocce and Luiz Nicolaci da Costa and Shantanu Desai and H. Thomas Diehl and J. P. Dietrich and Peter Doel and T. F. Eifler and August E. Evrard and David A. Finley and Brenna L. Flaugher and Pablo Fosalba and Joshua A. Frieman and Enrique Gazta{\~n}aga and David W. Gerdes and Daniel Gruen and Robert A. Gruendl and Gaston R. Guti{\'e}rrez and Klaus Honscheid and Kyler W. Kuehn and Nikolay Kuropatkin and Ofer Lahav and Paul Martini and Ramon Miquel and Brian Nord and R. L. C. Ogando and Andreas Alejandro Plazas and Kevin Alexander Reil and Aaron Roodman and Masao Sako and Eusebio S{\'a}nchez and Victor E. Scarpine and Michael S. Schubnell and Ignacio Sevilla-Noarbe and R. C. Smith and Marcelle Soares-Santos and Flavia Sobreira and Eric Suchyta and Mollye E. C. Swanson and Gregory G. Tarl{\'e} and Douglas L. Tucker and Vinu Vikram and William C. Wester and Y. Zhang and Joe Zuntz},
  journal={The Astrophysical Journal},
We report the discovery of eight new ultra-faint dwarf galaxy candidates in the second year of optical imaging data from the Dark Energy Survey (DES). Six of these candidates are detected at high confidence, while two lower-confidence candidates are identified in regions of non-uniform survey coverage. The new stellar systems are found by three independent automated search techniques and are identified as overdensities of stars, consistent with the isochrone and luminosity function of an old… 
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