https://doi.org/10.1140/epjc/s10052-018-6237-7
Letter
Interacting dark energy: possible explanation for 21-cm absorption at cosmic dawn
1
Instituto de Física, Universidade de São Paulo, C.P. 66318, 05315-970, São Paulo, SP, Brazil
2
SLAC National Accelerator Laboratory, 2575 Sand Hill Rd., Menlo Park, CA, 94025, USA
3
Center for Gravitation and Cosmology, YangZhou University, Yangzhou, 225009, China
* e-mail: rlandim@slac.stanford.edu
Received:
24
July
2018
Accepted:
10
September
2018
Published online:
18
September
2018
A recent observation points to an excess in the expected 21-cm brightness temperature from cosmic dawn. In this paper, we present an alternative explanation of this phenomenon, an interaction in the dark sector. Interacting dark energy models have been extensively studied recently and there is a whole variety of such in the literature. Here we particularize to a specific model in order to make explicit the effect of an interaction.
© The Author(s), 2018
