Code repository for the papers Edges and Endpoints in 21-cm from Resonant Photon Production by Andrea Caputo, Hongwan Liu, Siddharth Mishra-Sharma, Maxim Pospelov, Joshua T. Ruderman, and Alfredo Urbano.
We introduce a novel class of signatures---spectral edges and endpoints---in 21-cm measurements resulting from interactions between the standard and dark sectors. Within the context of a kinetically mixed dark photon, we demonstrate how resonant dark photon-to-photon conversions can imprint distinctive spectral features in the observed 21-cm brightness temperature, with implications for current, upcoming, and proposed experiments targeting the cosmic dawn and the dark ages. These signatures open up a qualitatively new way to look for physics beyond the Standard Model using 21-cm observations.
The dependencies of the code are listed in environments.yml. The code further relies on the following standalone codebases:
- twentyone-global to compute the global 21-cm temperature evolution, and
- dark-photons-perturbations to compute the photon-to-dark photon conversion probabilities in the presence of inhomogeneities.
The notebooks folder contains Jupyter notebooks that reproduce the plots in paper.
- Andrea Caputo; andrea dot caputo at uv dot es
- Hongwan Liu; hongwanl at princeton dot edu
- Siddharth Mishra-Sharma; sm8383 at nyu dot edu
- Maxim Pospelov; pospelov at umn dot edu
- Joshua T. Ruderman; ruderman at nyu dot edu
- Alfredo Urbano; alfredo dot urbano at sissa dot it
If you use this code, please cite our papers:
If you use this code, please cite:
@misc{caputo2020edges,
title={Edges and Endpoints in 21-cm Observations from Resonant Photon Production},
author={Andrea Caputo and Hongwan Liu and Siddharth Mishra-Sharma and Maxim Pospelov and Joshua T. Ruderman and Alfredo Urbano},
year={2020},
eprint={2009.03899},
archivePrefix={arXiv},
primaryClass={astro-ph.CO}
}