Astrophysics (Index)About

extragalactic background light

(electromagnetic radiation from star formation and AGNs)

The term extragalactic background light (EBL) typically refers to cosmic background radiation (CBR) over a range of wavelengths including visible light (the cosmic optical background) and more on each end: typically on the order of 0.1 to 1000 μm, spanning a range from the cosmic microwave background (CMB) into ultraviolet. Generally the term is intended to exclude the CMB, i.e., to mean "all that other electromagnetic radiation (EMR) around the universe". EBL is challenging to measure because of galactic sources of flux. Other terms used for various diffuse light:

Further reading:
0.1μm3.0PHz12eVbeginextragalactic background light
1000μm300GHz1.3meVendextragalactic background light

Referenced by pages:
cosmic background radiation (CBR)
cosmic optical background (COB)