Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 827, Issue 2, Pages -Publisher
IOP Publishing Ltd
DOI: 10.3847/2041-8205/827/2/L31
Keywords
radiation mechanisms: non-thermal; stars: black holes
Categories
Funding
- NASA [NNX15AK85G, NNX14AF85G]
- NASA [NNX15AK85G, 807299] Funding Source: Federal RePORTER
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The discoveries of GW150914, GW151226, and LVT151012 suggest that double black hole (BH-BH) mergers are common in the universe. If at least one of the two merging black holes (BHs) carries a certain amount of charge, possibly retained by a rotating magnetosphere, the inspiral of a BH-BH system would drive a global magnetic dipole normal to the orbital plane. The rapidly evolving magnetic moment during the merging process would drive a Poynting flux with an increasing wind power. The magnetospheric activities during the final phase of the merger would make a fast radio burst (FRB) if the BH charge can be as large as a factor of (q) over cap similar to (10(-9)-10(-8)) of the critical charge Q(c) of the BH. At large radii, dissipation of the Poynting flux energy in the outflow would power a short-duration high-energy transient, which would appear as a detectable short-duration gamma-ray burst (GRB) if the charge can be as large as (q) over cap similar to (10(-5)-10(-4)). The putative short GRB coincident with GW150914 recorded by Fermi GBM may be interpreted with this model. Future joint GW/GRB/FRB searches would lead to a measurement or place a constraint on the charges carried by isolate BHs.
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