File:Kerr-surfaces.png

Kerr-surfaces.png(800 × 588 pixels, file size: 60 KB, MIME type: image/png)

Summary

Description
English: Event horizons and ergospheres of a rotating black hole (spin parameter a=Jc/G/M²=0.99); the ring-singularity is located at the equatorial kink of the inner ergosphere at R=a.
Deutsch: Ereignishorizonte und Ergosphären eines mit dem Spinparameter a=Jc/G/M²=0.99 rotierenden schwarzen Lochs. Die Ringsingularität liegt an der äquatorialen Ausbuchtung der inneren Ergosphäre bei R=a.
Date
Source Own work (source)
Author Yukterez (Simon Tyran, Vienna)
Other versions
Kerr-Newman, Kerr & Reissner-Nordström surfaces
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Code

rE=1+Sqrt[1-a^2 Cos[θ]^2]; RE[A_]:={Sqrt[rE^2+A^2] Sin[θ]Cos[φ],Sqrt[rE^2+A^2] Sin[θ]Sin[φ],rE Cos[θ]};  (* outer ergosphere *)
rG=1-Sqrt[1-a^2 Cos[θ]^2]; RG[A_]:={Sqrt[rG^2+A^2] Sin[θ]Cos[φ],Sqrt[rG^2+A^2] Sin[θ]Sin[φ],rG Cos[θ]};  (* inner ergosphere *)
rA=1+Sqrt[1-a^2]; RA[A_]:={Sqrt[rA^2+A^2] Sin[θ]Cos[φ],Sqrt[rA^2+A^2] Sin[θ]Sin[φ],rA Cos[θ]};              (* outer horizon *)
rI=1-Sqrt[1-a^2]; RI[A_]:={Sqrt[rI^2+A^2] Sin[θ]Cos[φ],Sqrt[rI^2+A^2] Sin[θ]Sin[φ],rI Cos[θ]};              (* inner horizon *)
p[f_, c_]:=ParametricPlot3D[f, {φ, 0, 2 π}, {θ, 0, π}, PlotStyle -> Directive[c, Opacity[0.15]]]             (* plotfunction *)
Do[Print[Show[p[RE[a], Blue], p[RA[a], Cyan], p[RI[a], Orange], p[RG[a], Red]], {a,0,1,0.1}]]            (* cartesian, x,y,z *)
Do[Print[Show[p[RE[0], Blue], p[RA[0], Cyan], p[RI[0], Orange], p[RG[0], Red]], {a,0,1,0.1}]]      (* pseudospherical, r,θ,Ф *)

Comparison

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Captions

Horizon- and ergosurfaces of a rotating black hole

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25 June 2017

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Date/TimeThumbnailDimensionsUserComment
current05:21, 25 June 2017Thumbnail for version as of 05:21, 25 June 2017800 × 588 (60 KB)YukterezUser created page with UploadWizard
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