Constraining reionization with the first measurement of the CMB optical depth fluctuation – Compton-y cross-correlation

Toshiya Namikawa, Anirban Roy, Blake D. Sherwin, 3 Nicholas Battaglia, and David N. Spergel 5 Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, Unite Kingdom Department of Astronomy, Cornell University, Ithaca, NY 14853, USA Kavli Institute for Cosmology, University of Cambridge, Madingley Road, Cambridge CB3 OHA, United Kingdom Center for Computational Astrophysics, Flatiron Institute, 162 Fifth Avenue, New York NY 10010, USA Department of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton NJ 08544, USA (Dated: February 2, 2021)