Very extended cold gas, star formation and outflows in the halo of a bright quasar at z > 6 C. Cicone, R. Maiolino, S. Gallerani, R. Neri, A. Ferrara, E. Sturm, F. Fiore, E. Piconcelli and C. Feruglio A&A, 574 (2015) A14 Published online: 16 January 2015 DOI: 10.1051/0004-6361/201424980