Search Publications

Novel bounds on decaying axionlike particle dark matter from the cosmic background

Horns, Dieter; Porras-Bedmar, Sara; Meyer, Manuel

The cosmic background (CB) is defined as the isotropic diffuse radiation field with extragalactic origin found across the electromagnetic spectrum. Different astrophysical sources dominate the CB emission at different energies, such as stars in the optical or active galactic nuclei in x rays. Assuming that dark matter consists of axions or axionli…

Testing the CIBER cosmic infrared background measurements and axionlike particles with observations of TeV blazars

Tam, P. H. T.; Zhu, W. S.; Long, G. B. +1 more

The first measurements from the CIBER experiment of extragalactic background light (EBL) in near-infrared (NIR) band exhibit a higher intensity than those inferred through γ -ray observations. Recent theoretical-EBL intensities are typically consistent with the very high energy (VHE) γ -ray observations. Yet, it is possible that the excess NIR rad…

Axion-like particles and recent observations of the cosmic infrared background radiation

Kohri, Kazunori; Kodama, Hideo

The CIBER collaboration released their first observational data of the Cosmic IR background (CIB) radiation, which has significant excesses at around the wavelength ∼1 µ m compared to theoretically-inferred values. The amount of the CIB radiation has a significant influence on the opaqueness of the Universe for TeV gamma-rays emitted from di…