extragalactic background light (EBL) — An Etymological Dictionary of Astronomy and Astrophysics

extragalactic background light (EBL)

نور ِ پس-زمینه‌ی ِ استر-کهکشانی

nur-e paszimine-ye ostarkahkeši

Fr.: lumière du fond extragalactique

The integrated intensity of all of the light emitted throughout the history of the Universe across the whole of the → electromagnetic spectrum,
including those which are not individually detected. The EBL spectrum includes cosmological backgrounds associated with either primordial phenomena, such as the → cosmic microwave background radiation (CMBR),
or photons emitted by stars, galaxies and → active galactic nuclei (AGN) due to → nucleosynthesis or other → radiative processes, including → dust scattering, → absorption and reradiation. The EBL may also contain signals that are diffuse and extended, including high-energy photons associated with dark matter particle decays or annihilation.

See also: → extragalactic; → background; → light.

An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک