Photon emissions from near-horizon extremal and near-extremal Kerr equatorial emitters
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DOI: 10.1103/physrevd.104.124005
Abstract: We consider isotropic and monochromatic photon emissions from equatorial emitters moving along future-directed timelike geodesics in the near-horizon extremal Kerr (NHEK) and near-horizon near-extremal Kerr (near-NHEK) regions, to asymptotic infinity. We obtain numerical results for… read more here.
Keywords: near horizon; equatorial emitters; horizon extremal; photon emissions ... See more keywords
Separating metric perturbations in near-horizon extremal Kerr spacetimes
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DOI: 10.1103/physrevd.96.064017
Abstract: Linear perturbation theory is a powerful toolkit for studying black hole spacetimes. However, the perturbation equations are hard to solve unless we can use separation of variables. In the Kerr spacetime, metric perturbations do not… read more here.
Keywords: metric perturbations; near horizon; separating metric; extremal kerr ... See more keywords