The merger of two white dwarfs is expected to result in a central fast rotating core surrounded by a debris disk , in which magnetorotational instabilities give rise to a hot magnetized corona and a magnetized outflow .
The dissipation of magnetic energy via reconnection could lead to the acceleration of cosmic-rays in the expanding material , which would result in high energy neutrinos .
We discuss the possibility of using these neutrino signals as probes of the outflow dynamics , magnetic energy dissipation rate and cosmic-ray acceleration efficiency .
Importantly , the accompanying high-energy gamma-rays are absorbed within these sources because of the large optical depth , so these neutrino sources can be regarded as hidden cosmic-ray accelerators that are consistent with the non-detection of gamma-rays with Fermi-LAT .
While the cosmic-ray generation rate is highly uncertain , if it reaches \sim 10 ^ { 45 } erg Mpc ^ { -3 } yr ^ { -1 } , the diffuse neutrino flux could contribute a substantial fraction of the IceCube observations .
We also evaluate the prospect of observing individual merger events , which provides a means for testing such sources in the future .