Dec 13 – 18, 2015
International Conference Centre Geneva
Europe/Zurich timezone

CMB spectral distortions: energy release versus photon injection

Dec 14, 2015, 2:45 PM
Level 0, Room 4 (International Conference Centre Geneva)

Level 0, Room 4

International Conference Centre Geneva

17 Rue de Varembé, 1211 Geneva


Jens Chluba (Institute of Astronomy)


CMB spectral distortions caused by energy release in the early Universe create broad distortions that are usually described as superposition of mu-, y- and r-type distortions. These signals will allow us to gain new insights into the pre-recombination Universe, telling us about early-universe and particle physics. There is, however, another way to create distortions: by *photon injection*. One example is related to the hydrogen and helium recombination radiation emitted around *z*~1000, however, similarly decaying and annihilating particle scenarios or super-conducting strings should lead to copious photon production. The types of distortions that are created by photon injection show a much richer phenomenology than the classical mu and y distortions, as I will illustrate in my talk. This may provide additional ways of distinguishing different energy release mechanisms.

Primary author

Jens Chluba (Institute of Astronomy)

Presentation materials