Black Hole Accretion Disk Diffuse Neutrino Background

Understand

We study the cosmic MeV neutrino background from accretion disks formed during collapsars and the coalescence of compact-object mergers.

• We provide updated estimates, including detection rates, of relic neutrinos from collapsars, as well as estimates for neutrinos that are produced in mergers.
• Our results show that diffuse neutrinos detected at HyperK would likely include some that were emitted from binary neutron-star mergers.
• The collapsar rate is uncertain, but at its upper limit relic neutrinos from these sources would provide a significant contribution to the Cosmic Diffuse Neutrino Background.