Astro 2020 Science White Paper: Fundamental Cosmology in the Dark Ages with 21-cm Line Fluctuations

The Dark Ages are the period between the last scattering of the cosmic microwave background and the appearance of the first luminous sources, spanning approximately 1100 < z < 30. The only known way to measure fluctuations in this era is through the 21-cm line of neutral hydrogen. Such observa...

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Veröffentlicht in:arXiv.org 2019-03
Hauptverfasser: Furlanetto, Steven, Bowman, Judd D, Jordan Mirocha, Pober, Jonathan C, Burns, Jack, Carilli, Chris L, Munoz, Julian, Aguirre, James, Ali-Haimoud, Yacine, Alvarez, Marcelo, Beardsley, Adam, Becker, George, Breysse, Patrick, Bromm, Volker, Bull, Philip, Chang, Tzu-Ching, Chen, Xuelei, Chiang, Hsin, Cohn, Joanne, Davies, Frederick, DeBoer, David, Dillon, Joshua, Doré, Olivier, Dvorkin, Cora, Fialkov, Anastasia, Hazelton, Bryna, Jacobs, Daniel, Karkare, Kirit, Kohn, Saul, Koopmans, Leon, Kovetz, Ely, Paul La Plante, Lidz, Adam, Liu, Adrian, Yin-Zhe, Ma, Mao, Yi, Masui, Kiyoshi, Mesinger, Andrew, Murray, Steven, Parsons, Aaron, Saliwanchik, Benjamin, Sievers, Jonathan, Thyagarajan, Nithyanandan, Trac, Hy, Visbal, Eli, Zaldarriaga, Matias
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Sprache:eng
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Zusammenfassung:The Dark Ages are the period between the last scattering of the cosmic microwave background and the appearance of the first luminous sources, spanning approximately 1100 < z < 30. The only known way to measure fluctuations in this era is through the 21-cm line of neutral hydrogen. Such observations have enormous potential for cosmology, because they span a large volume while the fluctuations remain linear even on small scales. Observations of 21-cm fluctuations during this era can therefore constrain fundamental aspects of our Universe, including inflation and any exotic physics of dark matter. While the observational challenges to these low-frequency 21-cm observations are enormous, especially from the terrestrial environment, they represent an important goal for cosmology.
ISSN:2331-8422