An optical and H i study of the dwarf Local Group galaxy VV124 = UGC4879. A gas-poor dwarf with a stellar disk?

  title={An optical and H i study of the dwarf Local Group galaxy VV124 = UGC4879. A gas-poor dwarf with a stellar disk?},
  author={Michele Bellazzini and Giacomo Beccari and Tom Oosterloo and Silvia Regina Galleti and Antonio Sollima and Matteo Correnti and Vincenzo Testa and Lucio Mayer and Michele Cignoni and Filippo Fraternali and S. Gallozzi INAF-OABo and E.S.O.-Garching and NIRA-Dwingeloo and Kapteyn Astr. Inst. Groningen and Iac and INAF-OApd and Inaf-Oar and Itp - Un. Zurich and Institut fur Astronomie Zurich and Dip. Astr. Bologna},
  journal={Astronomy and Astrophysics},
We present a detailed study of the dwarf galaxy VV124 (UGC4879), recently recognized as a remarkably isolated member of the Local Group. We have obtained deep (r ≃ 26.5) wide-field (23' × 23') g,r photometry of individual stars with the LBC camera at the Large Binocular Telescope under sub-arcsec seeing conditions. The color-magnitude diagram suggests that the stellar content of the galaxy is dominated by an old, metal-poor population, with a significant metallicity spread. A very clean… Expand
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