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2019•arXiv (Cornell University)Open access

Cosmic Dawn and Reionization: Astrophysics in the Final Frontier

Asantha Cooray, James Aguirre, Yacine Ali-Haïmoud, Marcelo A. Alvarez, P. N. Appleton, L. Armus, George D. Becker, Jamie Bock, R. A. A. Bowler, Judd D. Bowman, Matt Bradford, Patrick C. Breysse, Volker Bromm, Jack O. Burns, K. I. Caputi, M. Castellano, Tzu‐Ching Chang, Ranga‐Ram Chary, H. C. Chiang, J. D. Cohn, Christopher J. Conselice, Jean-Gabriel Cuby, Frederick B. Davies, Pratika Dayal, Olivier Doré, D. Farrah, Andrea Ferrara, Steven L. Finkelstein, Steven R. Furlanetto, B. J. Hazelton, Caroline Heneka, Anne Hutter, Daniel Jacobs, L. V. E. Koopmans, Ely D. Kovetz, Paul La Piante, O. Le Fèvre, Adrian Liu, Jingzhe Ma, Yin-Zhe Ma, Sangeeta Malhotra, Yi Mao, Daniel P. Marrone, Kiyoshi W. Masui, Matthew McQuinn, Jordan Mirocha, D. Mortlock, E. J. Murphy, Hooshang Nayyeri, Priya Natarajan, Nithyanandan Thyagarajan, Aaron R. Parsons, R. Pelló, Alexandra Pope, James E. Rhoads, Jason Rhodes, Dominik A. Riechers, Brant Robertson, Claudia Scarlata, S. Serjeant, B. R. Saliwanchik, R. Salvaterra, Rafffaella Schneider, Marta B. Silva, M Sahlén, Mário G. Santos, Eric R. Switzer, P. Temi, Hy Trac, Aparna Venkatesan, Eli Visbal, Matías Zaldarriaga, M. Zemcov, Zheng Zheng

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Abstract

The cosmic dawn and epoch of reionization mark the time period in the universe when stars, galaxies, and blackhole seeds first formed and the intergalactic medium changed from neutral to an ionized one. Despite substantial progress with multi-wavelength observations, astrophysical process during this time period remain some of the least understood with large uncertainties on our existing models of galaxy, blackhole, and structure formation. This white paper outlines the current state of knowledge and anticipated scientific outcomes with ground and space-based astronomical facilities in the 2020s. We then propose a number of scientific goals and objectives for new facilities in late 2020s to mid 2030s that will lead to definitive measurements of key astrophysical processes in the epoch of reionization and cosmic dawn.

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The cosmic dawn and epoch of reionization mark the time period in the universe when stars, galaxies, and blackhole seeds first formed and the intergalactic medium changed from neutral to an ionized one. Despite substantial progress with multi-wavelength observations, astrophysical process during this time period remain some of the least understood with large uncertainties on our existing models of galaxy, blackhole, and structure formation. This white paper outlines the current state of knowledge and anticipated scientific outcomes with ground and space-based astronomical facilities in the 2020s. We then propose a number of scientific goals and objectives for new facilities in late 2020s to mid 2030s that will lead to definitive measurements of key astrophysical processes in the epoch of reionization and cosmic dawn.

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Available abstract

The cosmic dawn and epoch of reionization mark the time period in the universe when stars, galaxies, and blackhole seeds first formed and the intergalactic medium changed from neutral to an ionized one. Despite substantial progress with multi-wavelength observations, astrophysical process during this time period remain some of the least understood with large uncertainties on our existing models of galaxy, blackhole, and structure formation. This white paper outlines the current state of knowledge and anticipated scientific outcomes with ground and space-based astronomical facilities in the 2020s. We then propose a number of scientific goals and objectives for new facilities in late 2020s to mid 2030s that will lead to definitive measurements of key astrophysical processes in the epoch of reionization and cosmic dawn.

Key concepts: Reionization, COSMIC cancer database, Galaxy, Astrophysics, Physics, Astronomy, Stars, Epoch (astronomy)

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