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Author

Samim Akhtar

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Preprint Sep 2026

Classical soft theorems meet the post-Newtonian expansion

Classical soft theorems govern the non-analytic structure of electromagnetic and gravitational radiation in the low-frequency regime, with the gravitational memory effect providing the canonical realization of the classical soft graviton theorem. While the soft behavior of radiation from hyperbolic scattering is well u...

Samim Akhtar, R. Sturani · 3 citations
Preprint Sep 2026

On scalar and electromagnetic perturbations of the root--Kerr object

We study scalar and electromagnetic perturbations of the root--Kerr object. Its source-free exterior carries the electromagnetic field obtained in the vanishing-mass limit of the Kerr--Newman black hole, while its physical source is a rotating disk with an essential distributional rim contribution. For a massless charg...

Samim Akhtar · 0 citations

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