extragalactic background light
(electromagnetic radiation from star formation and AGNs)
The term extragalactic background light (EBL) typically
refers to cosmic background radiation over a range of wavelengths
including visible light (the cosmic optical background) and more on each end:
typically 0.1 and 1000μm, spanning a range from the cosmic microwave background
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.
| || |
|0.1μm||3.0PHz||12eV||begin||extragalactic background light|
|1000μm||300GHz||1.3meV||end||extragalactic background light|
cosmic background radiation (CBR)