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I'm currently in the process of understanding the properties of the Cauchy (or inner event) horizon in a rotating Kerr black hole. Initially, I thought the horizon was a result of centrifugal forces from the rotating ring singularity and extreme frame dragging that forced matter outwards, re-creating extremely curved time-like space within the confines of the black hole. I've since read that the Cauchy horizon is a result of matter hitting the ring singularity at (supposedly) superluminal speeds, recoiling and colliding with other matter falling inwards which causes a slow down and the re-creation of time-like space.
I was also initially under the impression that within the Cauchy horizon there would be a virtually pure vacuum with matter/light that had passed through the outer event horizon crashing into the Cauchy horizon as it was forced to slow down. I've recently read that within the Cauchy horizon of charged black holes, the volume consists of dense relativistic plasma and this might also apply to rotating black holes. I have slight issue with this as I've also read that within the confines of the ring singularity is negative space that exerts negative (or repellent) gravity. Wouldn't this repel the dense plasma away from the ring singularity towards the outer edge of the Cauchy horizon, leaving the ring singularity spinning in a disk of dense relativistic plasma that also reached out to the Cauchy horizon?
Another thing I've noticed is that the Cauchy horizon within a Kerr black hole seems to be frowned upon altogether (particularly within the discussion section of wiki for black holes where a suggestion to remove the section regarding the inner event horizon was carried through). The Cauchy horizon appears to be a part of Kerr metric, was it proposed by Roy Kerr or did he propose the metric for just the ergosphere and reduced outer event horizon, the inner event horizon suggested later? I'm also aware that some astrophysicists state that the Cauchy horizon wouldn't be stable due to the constant bombardment of extremely blue shifted light (gamma rays, etc.).
I'd be interested to hear peoples thoughts and opinions.
regards
Steve
I was also initially under the impression that within the Cauchy horizon there would be a virtually pure vacuum with matter/light that had passed through the outer event horizon crashing into the Cauchy horizon as it was forced to slow down. I've recently read that within the Cauchy horizon of charged black holes, the volume consists of dense relativistic plasma and this might also apply to rotating black holes. I have slight issue with this as I've also read that within the confines of the ring singularity is negative space that exerts negative (or repellent) gravity. Wouldn't this repel the dense plasma away from the ring singularity towards the outer edge of the Cauchy horizon, leaving the ring singularity spinning in a disk of dense relativistic plasma that also reached out to the Cauchy horizon?
Another thing I've noticed is that the Cauchy horizon within a Kerr black hole seems to be frowned upon altogether (particularly within the discussion section of wiki for black holes where a suggestion to remove the section regarding the inner event horizon was carried through). The Cauchy horizon appears to be a part of Kerr metric, was it proposed by Roy Kerr or did he propose the metric for just the ergosphere and reduced outer event horizon, the inner event horizon suggested later? I'm also aware that some astrophysicists state that the Cauchy horizon wouldn't be stable due to the constant bombardment of extremely blue shifted light (gamma rays, etc.).
I'd be interested to hear peoples thoughts and opinions.
regards
Steve
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