1. Center for Extreme Matter and Emergent Phenomena, Institute for Theoretical Physics, Utrecht University, Princetonplein 5, NL-3584CC Utrecht, the Netherlands
2. Institut d'Astrophysique de Paris, Sorbonne Universités, UPMC Univ Paris 6 et CNRS, UMR 7095, 98 bis bd Arago, F-75014 Paris, France
3. School of Physics, Korea Institute for Advanced Study (KIAS), 85 Hoegiro, Dongdaemun-gu, Seoul 02455, Republic of Korea
4. Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-85 83, Japan
5. CREST, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
6. Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 St. George Street, Toronto, ON M5S 3H8, Canada
7. CNRS and CEA, UMR 3681, Institut de Physique Théorique, F-91191 Gif-sur-Yvette, France