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The recent observation of the 21-cm absorption signal by the EDGES experiment provides a new observational window into the dynamics of the young Universe.
S. A. Wouthuysen, On the excitation mechanism of the 21-cm (radio-frequency) interstellar hydrogen emission line
1952
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G. B. Field, Excitation of the Hydrogen 21-CM Line
1958
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1985
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E. Masso and R. Toldra, On a light spinless particle coupled to photons
1995
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S. Seager, D. D. Sasselov, and D. Scott, A new calculation of the recombination epoch
1999
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X.-L. Chen and M. Kamionkowski, Particle decays during the cosmic dark ages
2004
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R. Barkana and A. Loeb, Detecting the earliest galaxies through two new sources of 21cm fluctuations
2005
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N. Padmanabhan and D. P. Finkbeiner, Detecting dark matter annihilation with CMB polarization: Signatures and experimental prospects
2005
Cited alongside, same era.
S. Furlanetto, S. P. Oh, and F. Briggs, Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
2006
Cited alongside, same era.
D. P. Finkbeiner and N. Weiner, Exciting Dark Matter and the INTEGRAL/SPI 511 keV signal
2007
Cited alongside, same era.
D. Cadamuro and J. Redondo, Cosmological bounds on pseudo Nambu-Goldstone bosons
2012
Cited alongside, same era.
P. Arias, D. Cadamuro, M. Goodsell, J. Jaeckel, J. Redondo, and A. Ringwald, WISPy Cold Dark Matter
2012
Cited alongside, same era.
J. Jaeckel, J. Redondo, and A. Ringwald, 3.55 keV hint for decaying axionlike particle dark matter
2014
Later among the works it cites.
D. P. Finkbeiner and N. Weiner, X-ray line from exciting dark matter
2016
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J. D. Bowman, A. E. E. Rogers, R. A. Monsalve, T. J. Mozdzen, and N. Mahesh, An absorption profile centred at 78 megahertz in the sky-averaged spectrum
2018
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2018
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2014
Cited alongside, same era.
2014
Cited alongside, same era.
J. B. Muñoz and A. Loeb, Insights on Dark Matter from Hydrogen during Cosmic Dawn
Cited in the paper.
Cited in the paper.
R. Barkana, N. J. Outmezguine, D. Redigolo, and T. Volansky, Signs of Dark Matter at 21-cm?
Cited in the paper.
Cited in the paper.
J. C. Hill and E. J. Baxter, Can Early Dark Energy Explain EDGES?
Cited in the paper.
2018
Closest in time.