Dipòsit Digital de la UB Universidad de Barcelona ResearcherID Astronomy and Astrophysics-A&A Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 599, pp.A50. ⟨10.1051/0004-6361/201629895⟩ Astronomy and Astrophysics-A&A, 2017, 599, pp.A50. ⟨10.1051/0004-6361/201629895⟩ Astronomy & Astrophysics (0004-6361), 599, A50 Astronomy & astrophysics, 599:A50. EDP Sciences