Accelerated formation of ultra-massive galaxies in the first billion years

Mengyuan Xiao, Pascal A. Oesch, D. Elbaz, L. Bing, Erica J. Nelson, Andrea Weibel, G. D. Illingworth, Pieter van Dokkum, Rohan P. Naidu, E. Daddi, R. J. Bouwens, Jorryt Matthee, Stijn Wuyts, John D. Chisholm, Gabriel Brammer, Mark Dickinson, B. Magnelli, L. Leroy, D. Schaerer, Thomas Herard-Demanche, Seunghwan Lim, Laia Barrufet, Ryan Endsley, Yoshinobu Fudamoto, Carlos Gómez-Guijarro, Rashmi Gottumukkala, Ivo Labbé, D. Magee, Danilo Marchesini, Michael V. Maseda, Yuxiang Qin, Naveen A. Reddy, Alice E. Shapley, Irene Shivaei, Marko Shuntov, Mauro Stefanon, Katherine E. Whitaker, J. Stuart B. Wyithe