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2018

The impact of EDGES 21-cm data on dark matter interactions

Cheung, Kingman, Kuo, Jui-Lin, Ng, Kin-Wang et al.

Understand

The recently announced results on the 21-cm absorption spectrum by the EDGES experiment can place very stringent limits on dark matter annihilation cross-sections.

We properly take into account the heating energy released from dark matter annihilation from the radiation epoch to the 21-cm observation redshifts in the radiative transfer to compute the evolution of the gas temperature.
Our results show that the global 21-cm absorption profile is a powerful cosmological probe of the dark matter interactions.
For dark matter annihilating into electron-positron pairs, the EDGES results give a more stringent upper limit than the PLANCK result on the annihilation cross section at the lower dark matter mass region.

Built on

J. E. Gunn and B. A. Peterson, Astrophys. J. 142
1965
Earlier work this paper cites.
N. W. Boggess et al
1992
Earlier work this paper cites.
S. Seager, D. D. Sasselov and D. Scott, Astrophys. J. 523
1999
Earlier work this paper cites.
X. L. Chen and M. Kamionkowski, Phys. Rev. D 70
2004
Earlier work this paper cites.
Chen Xue-Lei and Kamionkowski Marc, Phys. Rev. D 70
2004
Earlier work this paper cites.
T. Kanzaki and M. Kawasaki, Phys. Rev. D 78
Original
2008
Earlier work this paper cites.
T. R. Slatyer, N. Padmanabhan and D. P. Finkbeiner, Phys. Rev. D 80
Original
2009
Earlier work this paper cites.
T. Kanzaki, M. Kawasaki and K. Nakayama, Prog. Theor. Phys. 123
Original
2010
Earlier work this paper cites.
M. Cirelli et al
Original
2011
Earlier work this paper cites.
J. R. Pritchard and A. Loeb, Rept. Prog. Phys. 75
Original
2012
Earlier work this paper cites.
S. J. Tingay et al
Original
2012
Earlier work this paper cites.
C. Evoli, M. Valdes, A. Ferrara and N. Yoshida, Mon. Not. Roy. Astron. Soc. 422
2012
Earlier work this paper cites.