S. Blondin1 L. Dessart2 D. J. Hillier3 C. A. Ramsbottom4 and P. J. Storey5 -------------------------- 1 Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France 2Institut d’Astrophysique de Paris, CNRS-Sorbonne Université, 98 bis boulevard Arago, 75014, Paris, France 3 Department of Physics and Astronomy & Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), University of Pittsburgh, 3941 O’Hara Street, Pittsburgh, PA 15260, USA 4 Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University Belfast, Belfast BT7 1NN, Northern Ireland, UK 5 Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK