2 ms·
Yes, TFA says nothing about what happens after surviving the fall. But from Burko and Khanna (2019) I get this: > The fate of an astronaut who falls into a bla
by mirimir 8y ago
Yes, TFA says nothing about what happens after surviving the fall. But from Burko and Khanna (2019) I get this:
> The fate of an astronaut who falls into a black hole depends not just on the latter’s properties (such as the intrinsic parameters, i.e., the mass and spin angular momentum, and the external perturbation fields) but also on the former’s worldline. ... However, astronauts with positive energy and low angular momentum (including counterrotating ones) arrive at the outgoing leg of the black hole’s inner horizon ("outgoing inner horizon", henceforth, OIH).
> The properties of spacetime at the OIH have been proposed to be those of an effective shock wave singularity. Specifically, it was proposed in [2] that daughters of a family of free-falling astronauts whose geodesics intersect with the OIH, and who are separated only by time translations (and labeled by the advanced time values at which they cross the event horizon (EH) [symbols]) experience a change of order unity in typical metric perturbations, and that these changes occur over a lapse of proper time that drops like [symbols] with increasing [symbols], where [symbols] is the surface gravity of the OIH. Sufficiently late-falling daughters therefore experience an effective shock wave singularity, the Marolf-Ori singularity ("outflying singularity").
I have no clue what that means. Anyone?
0) Burko and Khanna (2019) The Marolf-Ori singularity inside fast spinning black holes, https://arxiv.org/pdf/1901.03413.pdf https://arxiv.org/pdf/1901.03413.pdf