File:Naked.Singularity,Overextremal.Kerr.Newman,Polar.View,Shadow.png: Difference between revisions
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Yukterez uploaded a new version of File:Naked.Singularity,Overextremal.Kerr.Newman,Polar.View,Shadow.png |
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=={{int:filedesc}}== |
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{{Information |
{{Information |
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|description={{en|1=[[:en:Gravitational_lens|Gravitational lensing]] of an overextremal [[:en:Kerr%E2%80%93Newman_metric|Kerr-Newman]] naked [[:en:Ring_singularity|ring singularity]] with spin a/M=√2 and charge Q/M=√2, in [[:en:Natural_units|natural units]] of [[:en:Gravitational_constant|G]]=[[:en:Coulomb%27s_constant|K]]=[[:en:Speed_of_light|c]]=[[:en:Unity#Science_and_technology|1]] (so a²+Q²=2M²). The observer is at r=50M and views the [[:en:Naked_singularity|naked singularity]] from diagonally above at θ=45°; it's left side is rotating towards the observer. [[:en:Field_of_view|FOV]]: 77.4°×38.7°. The equations that were used to [https://en.wikipedia.org/wiki/Ray_tracing_(physics)#General_relativity raytrace] the image can be found [https://commons.wikimedia.org/wiki/File:Kerr-Newman-Orbit-1.gif#Equations here].}} |
|description={{en|1=[[:en:Gravitational_lens|Gravitational lensing]] of an overextremal [[:en:Kerr%E2%80%93Newman_metric|Kerr-Newman]] naked [[:en:Ring_singularity|ring singularity]] with spin a/M=√2 and charge Q/M=√2, in [[:en:Natural_units|natural units]] of [[:en:Gravitational_constant|G]]=[[:en:Coulomb%27s_constant|K]]=[[:en:Speed_of_light|c]]=[[:en:Unity#Science_and_technology|1]] (so a²+Q²=2M²). The observer is at r=50M and views the [[:en:Naked_singularity|naked singularity]] from diagonally above at θ=45°; it's left side is rotating towards the observer. [[:en:Field_of_view|FOV]]: 77.4°×38.7°. The equations that were used to [https://en.wikipedia.org/wiki/Ray_tracing_(physics)#General_relativity raytrace] the image can be found [https://commons.wikimedia.org/wiki/File:Kerr-Newman-Orbit-1.gif#Equations here]. Comparison: Ref. 1<ref>[http://member.ipmu.jp/rie.ujita/slides_gravity/wednesday/maeda.pdf#page=14 Wased Uiversity: Gravitational Lensing and Black Hole Shadows, p.14]</ref> and Ref 2<ref>[http://cyber.sci-hub.hk/MTAuMTA4OC8wMjY0LTkzODEvMTcvMS8zMDk=/vries1999.pdf#page=20 DeVries: The apparent shape of a rotating charged black hole, closed photon orbits and the bifurcation, p.20]</ref>}} |
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|date=2018-04-19 |
|date=2018-04-19 |
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|source={{own}} |
|source={{own}} |
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[[File:Black.Hole,Extremal.Kerr.Newman,Raytracing.png|thumb|left|400px|Extremal Kerr-Newman black hole with the same total energy as the naked singularity above]] |
[[File:Black.Hole,Extremal.Kerr.Newman,Raytracing.png|thumb|left|400px|Extremal Kerr-Newman black hole with the same total energy as the naked singularity above]] |
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