Theory Colloquia

The cosmic optical background excess, line-intensity mapping

by Marc Kamionkowski

Europe/Zurich
Zoom only (CERN)

Zoom only

CERN

Description

Recently, the New Horizons spacecraft was able to detect, for the first time, the cosmic background of optical light.  The signal was twice that expected from galaxy number counts.  This excess can be explained in terms of two-photon decay of a dark-matter axion, a hypothesis that will be tested with line-intensity mapping very high significance with the impending launch of NASA’s SphereX.  I will discuss line-intensity mapping and show how it can be used to probe dark matter, neutrino decays, and other exotic physics.

Videoconference
TH colloquia
Zoom Meeting ID
67346292748
Host
Elena Gianolio
Alternative hosts
AVC support account, Zoom Recording Operations 2, Irene Valenzuela Agui, Thomas Nik Bazl Fard, Urs Wiedemann, Pier Francesco Monni, Pascal Pignereau, Clement Montcharmont, Benoit Loyer
Passcode
80279029
Useful links
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