Looking for the Signals of the Missing Baryons in the Extragalactic Background Light
arXiv:2208.10363 · doi:10.1142/S0217751X23500136
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.
arXiv comment11 pages and 2 figures. A modified version and accepted for publication in In.J.Mod.Phys.A
References in corpus (16)
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
- Where are the Baryons?
- Baryons in the Warm-Hot Intergalactic Medium
- Extragalactic Background Light Inferred from AEGIS Galaxy SED-type Fractions
- A census of baryons in the Universe from localized fast radio bursts
- The Search for the Missing Baryons at Low Redshift
- An OVI Baryon Census of the Low-z Warm-Hot Intergalactic Medium
- New Spectral Evidence of an Unaccounted Component of the Near-infrared Extragalactic Background Light from the CIBER
- Cosmic Optical Background: the View from Pioneer 10/11
- The Near-IR Background Intensity and Anisotropies During The Epoch of Reionization
- Extragalactic background Light: a measurement at 400 nm using dark cloud shadow II. Spectroscopic separation of dark cloud's light, and results
- Fundamentalist physics: why Dark Energy is bad for Astronomy
- Improved Bethe-Heitler formula
- Looking for the possible gluon condensation signature in sub-TeV gamma-ray spectra: from active galactic nuclei to gamma ray bursts
- Anomalous bremsstrahlung and the structure of cosmic ray electron-positron fluxes at the GeV-TeV energy range