Ground-based optical astronomy necessarily involves sensing the light of astronomical
objects along with the contributions of many natural sources ranging from the Earth's …

The propagation of gamma-rays over cosmological distances is the subject of extensive
theoretical and observational research at GeV and TeV energies. The mean free path of …

The diffuse extragalactic background light (EBL) is formed by ultraviolet (UV), optical, and
infrared (IR) photons mainly produced by star formation processes over the history of the …

A radiative decaying big bang relic with a mass ma≃ 5–25 eV, which we dub “blue axion,”
can be probed with direct and indirect observations of the cosmic optical background (COB) …

Abstract We used New Horizons LORRI images to measure the optical-band (0.4≲ λ≲
0.9μm) sky brightness within a high-galactic-latitude field selected to have reduced diffuse …

We investigate the formation of intermediate mass black holes (IMBHs) through hierarchical
mergers of stellar origin black holes (BHs), as well as BH mergers formed dynamically in …

Recent studies using New Horizons's Long Range Reconnaisance Imager (LORRI) images
have returned the most precise measurement of the cosmic optical background to date …

We present an updated model for the extragalactic background light (EBL) from stars and
dust, over wavelengths≈ 0.1–1000 μm. This model uses accurate theoretical stellar spectra …

Recently anomalous flux in the cosmic optical background (COB) is reported by the New
Horizon observations. The COB flux is 16.37±1.47 n Wm− 2 sr− 1, at the LORRI pivot …

The flux of high-energy astrophysical γ rays is attenuated by the production of electron-
positron pairs from scattering off of extragalactic background light (EBL). We use the most up …