Discovery of a Perseus-like cloud in the early Universe - H I-to-H2 transition, carbon monoxide and small dust grains at zabs≈ 2.53 towards the quasar J0000+0048
P. Noterdaeme, J.-K. Krogager, S. Balashev, J. Ge, N. Gupta, T. Krühler, C. Ledoux, M. T. Murphy, I. Pâris, P. Petitjean, H. Rahmani, R. Srianand and W. Ubachs
