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Near horizon linearized gravity and soft theorem
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In this paper, we study the linearized gravity theory in the near horizon region of the Schwarzschild black hole in four dimensional spacetime. Under the Newman-Unti gauge, we derive the most general near horizon symmetry and solution space without any near horizon fall-off condition. There are four towers of surface charges that are generic functions on the horizon associated to the near horizon symmetry. With suitable near horizon fall-off conditions, we reveal a soft graviton theorem from the Ward identity of the near horizon supertranslation in both coordinates space and momentum space.
Forward citations
Cited by 2 Pith papers
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"Waveforms" at the Horizon
A probe scattering off a Schwarzschild black hole transfers a definite leading-order post-Minkowskian angular momentum to the horizon, given by new closed formulas (3.24b), (3.29), (3.36).
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Scattering Hawking Radiation
The paper re-expresses the flat-space soft photon theorem in Schwarzschild coordinates and claims a new information pathway from scattering Hawking radiation, but the redshift premise is flawed.
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