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P. J. E. Peebles Astrophys. J
1968
Earlier work this paper cites.
Ya. B. Zeldovich, V. G. Kurt, and R. A. Sunyaev Sov. Phys. JETP
1968
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P. Madau, A. Meiksin, and M. J. Rees Astrophys. J
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A. A. Prinz et al. Phys. Rev. Lett
1998
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S. Davidson, S. Hannestad, and G. Raffelt JHEP
2000
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M. Zaldarriaga, S. R. Furlanetto, and L. Hernquist Astrophys. J
2004
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M. Pospelov Phys. Rev. Lett
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K. Kohri and F. Takayama Phys. Rev
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I. M. Shoemaker and A. Kusenko Phys. Rev
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L. Senatore, S. Tassev, and M. Zaldarriaga JCAP
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Y. Ali-Haimoud and C. M. Hirata Phys. Rev
Original
2010
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Y. Ali-Haimoud and C. M. Hirata Phys. Rev
Original
2011
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A. Falkowski, J. T. Ruderman, and T. Volansky JHEP
Original
2011
Earlier work this paper cites.

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2018

21cm absorption signal from charge sequestration

Falkowski, Adam, Petraki, Kalliopi

Understand

The unexpectedly strong 21cm absorption signal detected by the EDGES experiment suggests that the baryonic gas was colder at redshift $z\sim 17$ than predicted in the standard scenario.

We discuss a mechanism to lower the baryon temperature after recombination.
We introduce a stable, negatively-charged particle with a non-negligible cosmological abundance, such that the universe remains charge-neutral but the electron and proton numbers are no longer equal.
The deficit of electrons during recombination results in an earlier decoupling of the baryon gas temperature from that of the CMB.

Built on

P. J. E. Peebles Astrophys. J
1968
Earlier work this paper cites.
Ya. B. Zeldovich, V. G. Kurt, and R. A. Sunyaev Sov. Phys. JETP
1968
Earlier work this paper cites.
P. Madau, A. Meiksin, and M. J. Rees Astrophys. J
1997
Earlier work this paper cites.
A. A. Prinz et al. Phys. Rev. Lett
1998
Earlier work this paper cites.
S. Davidson, S. Hannestad, and G. Raffelt JHEP
2000
Earlier work this paper cites.
M. Zaldarriaga, S. R. Furlanetto, and L. Hernquist Astrophys. J
2004
Earlier work this paper cites.
M. Pospelov Phys. Rev. Lett
2007
Earlier work this paper cites.
K. Kohri and F. Takayama Phys. Rev
2007
Earlier work this paper cites.
I. M. Shoemaker and A. Kusenko Phys. Rev
Original
2008
Earlier work this paper cites.
L. Senatore, S. Tassev, and M. Zaldarriaga JCAP
Original
2009
Earlier work this paper cites.
Y. Ali-Haimoud and C. M. Hirata Phys. Rev
Original
2010
Earlier work this paper cites.
Y. Ali-Haimoud and C. M. Hirata Phys. Rev
Original
2011
Earlier work this paper cites.
A. Falkowski, J. T. Ruderman, and T. Volansky JHEP
Original
2011
Earlier work this paper cites.