Analytic explanation of the strong spin-dependent amplification in Hawking radiation from rotating black holes

Understand

Numerical studies of black hole greybody factors indicate that Hawking emission from a highly rotating black hole is strongly spin dependent, with particles of highest spin (gravitons) dominating the energy spectrum.

• So far, there has been no analytic explanation or description of this effect.
• Using "gravitomagnetism", or the formal analogy between the Maxwell's field equations for electro- magnetism and Einstein's equations for gravity, we were able to establish a link between the spin of the rotating black hole and spin of an emitted particle.
• Namely, the intrinsic spin of the particle creates a "mass dipole moment" which interacts with external gravitomagnetic field whose source is the rotation of the black hole.