Alexander Beckett CNRS, Laboratoire d'Astrophysique de Marseille Erin Boettcher University of Maryland Hsiao-Wen Chen University of Chicago Mandy Chen Carnegie Institution of Washington Rajeshwari Dutta Inter-University Centre for Astronomy and Astrophysics Michele Fumagalli Universita degli Studi di Milano-Bicocca Sean Johnson University of Michigan Kalina Nedkova California Institute of Technology Grecco Oyarzun University of Oklahoma Norman Campus Zhijie Qu Tsinghua University Marc Rafelski Space Telescope Science Institute Mitchell Revalski Space Telescope Science Institute Gwen C. Rudie Carnegie Institution of Washington Joop Schaye Universiteit Leiden Fakhri S Zahedy University of North Texas