Looking for the Signals of the Missing Baryons in the Extragalactic Background Light
Abstract
The missing baryons in the universe are assumed to be hidden in the whole space as a warm-hot intergalactic medium (WHIM). Finding them is one of the important subjects in modern cosmology. In this paper, we point out that the very high energy electron/positron rays may light up the WHIM due to the anomalous bremsstrahlung according to an improved Bethe-Heitler formula. The resulting excess of the extragalactic background light (EBL) can be observed by the direct measurement method. A possible explanation on the difference between the direct and indirect measurements of EBL is also proposed. Thus, we find a new window to probe the WHIM properties via the EBL.
Keywords
Cite
@article{arxiv.2208.10363,
title = {Looking for the Signals of the Missing Baryons in the Extragalactic Background Light},
author = {Wei Zhu and Rong Wang},
journal= {arXiv preprint arXiv:2208.10363},
year = {2023}
}
Comments
11 pages and 2 figures. A modified version and accepted for publication in In.J.Mod.Phys.A