The postmerger ringdown frequency of promptly collapsing binary neutron star mergers is correlated with accretion disk mass, allowing a proposed 10 percent measurement with third-generation gravitational wave detectors.
Neutrino heating near hyper-accreting black holes
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abstract
Hyper-accretion discs around black holes emit copious neutrinos and anti-neutrinos. A fraction of the emitted neutrinos convert to electron-positron plasma above the disc through the annihilation reaction $\nu\bar\nu\to e^+e^-$. This process may drive relativistic jets associated with GRB explosions. We calculate the efficiency of energy deposition by neutrinos. Our calculation is fully relativistic and based on a geodesic-tracing method. We find that the efficiency of neutrino heating is a well-defined function of (i) accretion rate and (ii) spin of the black hole. It is practically independent of the details of neutrino transport in the opaque zone of the disc. The results help identify accretion discs whose neutrino emission can power GRBs.
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Direct Measurement of the Accretion Disk Formed in Prompt Collapse Mergers with Future Gravitational-Wave Observatories
The postmerger ringdown frequency of promptly collapsing binary neutron star mergers is correlated with accretion disk mass, allowing a proposed 10 percent measurement with third-generation gravitational wave detectors.