Three Lyman-α-emitting filaments converging to a massive galaxy group at z = 2.91: discussing the case for cold gas infall

  title={Three Lyman-$\alpha$-emitting filaments converging to a massive galaxy group at z = 2.91: discussing the case for cold gas infall},
  author={Emanuele Daddi and Francesco M. Valentino and R. Michael Rich and James D. Neill and Max Gronke and Donal O'Sullivan and David Elbaz and Fr{\'e}d{\'e}ric Bournaud and Alexis Finoguenov and Antoine F. J. Marchal and Ivan Delvecchio and S. Jin and D. Liu and Antonello Calabro and Rosemary T. Coogan and Chiara D'Eugenio and Raphael Gobat and Boris S. Kalita and Peter Laursen and D. Christopher Martin and Annagrazia Puglisi and Eva Schinnerer and Veronica Strazzullo and T. Wang},
  journal={Astronomy \& Astrophysics},
We have discovered a 300 kpc-wide giant Lyman-α (Lyα) nebula centered on the massive galaxy group RO-1001 at z = 2.91 in the Cosmic Evolution Survey field. Keck Cosmic Web Imager observations reveal three cold gas filaments converging into the center of the potential well of its ∼4 × 1013 M⊙ dark matter halo, hosting 1200 M⊙ yr−1 of star formation as probed by Atacama Large Millimeter Array and NOrthern Extended Millimeter Array observations. The nebula morphological and kinematics properties… Expand
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