Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, 2009, 396 (4), pp.1833-1841. ⟨10.1111/J.1365-2966.2009.14903.X⟩ Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2009, 396 (4), pp.1833-1841. ⟨10.1111/J.1365-2966.2009.14903.X⟩