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Comparison of Low-Redshift Lyman- α Forest Observations to Hydrodynamical Simulations with Dark Photon Dark Matter

Bolton, James S.; Caputo, Andrea; Liu, Hongwan; Viel, Matteo

Comparison of Low-Redshift Lyman- α Forest Observations to Hydrodynamical Simulations with Dark Photon Dark Matter Thumbnail


Authors

Andrea Caputo

Hongwan Liu

Matteo Viel



Abstract

Recent work has suggested that an additional ≲6.9 eV per baryon of heating in the intergalactic medium is needed to reconcile hydrodynamical simulations with Lyman-α forest absorption line widths at redshift z≃0.1. Resonant conversion of dark photon dark matter into low frequency photons is a viable source of such heating. We perform the first hydrodynamical simulations including dark photon heating and show that dark photons with mass mA′∼8×10-14 eV c-2 and kinetic mixing ϵ∼5×10-15 can alleviate the heating excess. A prediction of this model is a nonstandard thermal history for underdense gas at z≳3.

Citation

Bolton, J. S., Caputo, A., Liu, H., & Viel, M. (2022). Comparison of Low-Redshift Lyman- α Forest Observations to Hydrodynamical Simulations with Dark Photon Dark Matter. Physical Review Letters, 129(21), Article 211102. https://doi.org/10.1103/physrevlett.129.211102

Journal Article Type Article
Acceptance Date Oct 13, 2022
Online Publication Date Nov 18, 2022
Publication Date Nov 18, 2022
Deposit Date Nov 18, 2022
Publicly Available Date Nov 24, 2022
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society (APS)
Peer Reviewed Peer Reviewed
Volume 129
Issue 21
Article Number 211102
DOI https://doi.org/10.1103/physrevlett.129.211102
Keywords General Physics and Astronomy
Public URL https://nottingham-repository.worktribe.com/output/13754369
Publisher URL https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.129.211102

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