Corpus ID: 119495736

The double main sequence of Omega Centauri

  title={The double main sequence of Omega Centauri},
  author={Luigi R. Bedin and Giampaolo Piotto and J. L. Anderson and Ivan R. King and Santi Cassisi and Y. Momany . Dipartimento di Astronomia and Universit̀a di Padova and Italy Department of Physics and Astronomy and Rice University and Usa and Astronomy Department and University of Washington and Osservatorio Astronomico di Collurania and Italy.},
  journal={arXiv: Astrophysics},
Recent, high precision photometry of Omega Centauri, the biggest Galactic globular cluster, has been obtained with Hubble Space Telescope. The color magnitude diagram reveals an unexpected bifurcation of colors in the main sequence (MS). The newly found double MS, the multiple turnoffs and subgiant branches, and other sequences discovered in the past along the red giant branch of this cluster add up to a fascinating but frustrating puzzle. Among the possible explanations for the blue main… Expand

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