Monthly Notices of the Royal Astronomical Society: Letters Monthly Notices of the Royal Astronomical Society: Letters, 2019, 483 (1), pp.L1-L5. ⟨10.1093/mnrasl/sly207⟩ Monthly Notices of the Royal Astronomical Society: Letters, Oxford Journals, 2019, 483 (1), pp.L1-L5. ⟨10.1093/mnrasl/sly207⟩