Mapping Cosmic Dawn and Reionization: Challenges and Synergies

11 Mar 2019  ·  Alvarez Marcelo A., Fialkov Anastasia, La Plante Paul, Aguirre James, Ali-Haïmoud Yacine, Becker George, Bowman Judd, Breysse Patrick, Bromm Volker, Bull Philip, Burns Jack, Cappelluti Nico, Carucci Isabella, Chang Tzu-Ching, Cleary Kieran, Cooray Asantha, Chen Xuelei, Chiang Hsin, Cohn Joanne, DeBoer David, Dillon Joshua, Doré Olivier, Dvorkin Cora, Ferraro Simone, Furlanetto Steven, Hazelton Bryna, Hill J. Colin, Jacobs Daniel, Karkare Kirit, Keating Garrett K., Koopmans Léon, Kovetz Ely, Lidz Adam, Liu Adrian, Ma Yin-Zhe, Mao Yi, Masui Kiyoshi, McQuinn Matthew, Mirocha Jordan, Muñoz Julian, Murray Steven, Parsons Aaron, Pober Jonathan, Saliwanchik Benjamin, Sievers Jonathan, Thyagarajan Nithyanandan, Trac Hy, Vikhlinin Alexey, Visbal Eli, Zaldarriaga Matias ·

Cosmic dawn and the Epoch of Reionization (EoR) are among the least explored observational eras in cosmology: a time at which the first galaxies and supermassive black holes formed and reionized the cold, neutral Universe of the post-recombination era. With current instruments, only a handful of the brightest galaxies and quasars from that time are detectable as individual objects, due to their extreme distances... Fortunately, a multitude of multi-wavelength intensity mapping measurements, ranging from the redshifted 21 cm background in the radio to the unresolved X-ray background, contain a plethora of synergistic information about this elusive era. The coming decade will likely see direct detections of inhomogenous reionization with CMB and 21 cm observations, and a slew of other probes covering overlapping areas and complementary physical processes will provide crucial additional information and cross-validation. To maximize scientific discovery and return on investment, coordinated survey planning and joint data analysis should be a high priority, closely coupled to computational models and theoretical predictions. read more

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Cosmology and Nongalactic Astrophysics