Astronomy and Astrophysics Seminars

The Far Ultraviolet diffuse background

by Prof. Shrinivas Kulkarni (Caltech, USA)

Tuesday, August 10, 2021 from to (Asia/Kolkata)
at Zoom link: ( (Meeting ID: 988 5432 2651 Passcode: 484210) )
Meeting ID: 988 5432 2651 Passcode: 484210
The study of diffuse FUV emission has motivated a number of experiments and missions. The current view is that the diffuse FUV emission at high latitudes has three components: stellar FUV reflected by dust grains (diffuse galactic light or DGL), FUV from other galaxies (extra-galactic background light, EBL) and a component of unknown origin. During the eighties, there was some discussion that decaying dark matter particles produced FUV radiation. In my talk I systematically investigate production of FUV photons by the Galactic Hot Ionized Medium (line emission) and two photon emission from Warm Ionized Medium, low velocity shocks and several locales in the Solar System (the interplanetary medium, the exosphere and thermosphere of Earth). I conclude that two thirds to perhaps all of the third component can be explained by the sum of the processes listed above.