Massive star formation within the Leo ‘primordial’ ring

@article{Thilker2009MassiveSF,
  title={Massive star formation within the Leo ‘primordial’ ring},
  author={D. Thilker and J. Donovan and D. Schiminovich and L. Bianchi and S. Boissier and A. Paz and B. Madore and D. C. Martin and M. Seibert},
  journal={Nature},
  year={2009},
  volume={457},
  pages={990-993}
}
Few intergalactic, plausibly primordial clouds of neutral atomic hydrogen (H i) have been found in the local Universe, suggesting that such structures have either dispersed, become ionized or produced a stellar population on gigayear timescales. The Leo ring, a massive (MH i ≈ 1.8 × 109, denoting the solar mass), 200-kpc-wide structure orbiting the galaxies M105 and NGC 3384 with a 4-Gyr period, is a candidate primordial cloud. Despite repeated atttempts, it has previously been seen only from H… Expand
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