Reissner–Nordström Penrose diagram
E68111
The Reissner–Nordström Penrose diagram is a causal spacetime diagram depicting the global structure of a charged, non-rotating black hole, including its multiple horizons and extended regions.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Reissner–Nordström Penrose diagram canonical | 2 |
| Schwarzschild Penrose diagram by having inner and outer horizons | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T543899 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Reissner–Nordström Penrose diagram Context triple: [Schwarzschild Penrose diagram, contrastsWith, Reissner–Nordström Penrose diagram]
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A.
Kerr Penrose diagram
The Kerr Penrose diagram is a conformal spacetime diagram depicting the causal structure of a rotating (Kerr) black hole, including its event horizons, ergoregions, and extended regions.
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B.
Schwarzschild Penrose diagram
The Schwarzschild Penrose diagram is a conformal spacetime diagram that compactly represents the causal structure of a non-rotating, uncharged black hole, including its event horizon and singularity.
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C.
Reissner–Nordström metric
The Reissner–Nordström metric is an exact solution in general relativity describing the spacetime geometry outside a static, spherically symmetric, electrically charged black hole.
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D.
Kruskal–Szekeres coordinates
Kruskal–Szekeres coordinates are a maximal extension coordinate system used in general relativity to smoothly describe the entire spacetime of a Schwarzschild black hole, including regions across the event horizon.
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E.
Painlevé–Gullstrand coordinates
Painlevé–Gullstrand coordinates are a coordinate system for the Schwarzschild black hole that is regular at the event horizon and represents spacetime as seen by freely falling observers.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Reissner–Nordström Penrose diagram Target entity description: The Reissner–Nordström Penrose diagram is a causal spacetime diagram depicting the global structure of a charged, non-rotating black hole, including its multiple horizons and extended regions.
-
A.
Kerr Penrose diagram
The Kerr Penrose diagram is a conformal spacetime diagram depicting the causal structure of a rotating (Kerr) black hole, including its event horizons, ergoregions, and extended regions.
-
B.
Schwarzschild Penrose diagram
The Schwarzschild Penrose diagram is a conformal spacetime diagram that compactly represents the causal structure of a non-rotating, uncharged black hole, including its event horizon and singularity.
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C.
Reissner–Nordström metric
The Reissner–Nordström metric is an exact solution in general relativity describing the spacetime geometry outside a static, spherically symmetric, electrically charged black hole.
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D.
Kruskal–Szekeres coordinates
Kruskal–Szekeres coordinates are a maximal extension coordinate system used in general relativity to smoothly describe the entire spacetime of a Schwarzschild black hole, including regions across the event horizon.
-
E.
Painlevé–Gullstrand coordinates
Painlevé–Gullstrand coordinates are a coordinate system for the Schwarzschild black hole that is regular at the event horizon and represents spacetime as seen by freely falling observers.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Penrose diagram
ⓘ
causal spacetime diagram ⓘ conformal diagram ⓘ |
| assumes |
electrovacuum solution of Einstein–Maxwell equations
ⓘ
spherical symmetry ⓘ |
| describes |
Reissner–Nordström metric
ⓘ
surface form:
Reissner–Nordström spacetime
charged non-rotating black hole ⓘ |
| distinguishes |
extremal Reissner–Nordström case
ⓘ
non-extremal Reissner–Nordström case ⓘ |
| encodes |
causal connectivity between different regions
ⓘ
possibility of travel between asymptotic regions in idealized solution ⓘ |
| includes |
maximally extended Reissner–Nordström spacetime
ⓘ
regions separated by Cauchy horizons ⓘ regions separated by event horizons ⓘ |
| models | spacetime of a point charge with mass and electric charge ⓘ |
| relatedTo |
Kerr Penrose diagram
ⓘ
Penrose–Carter diagrams ⓘ
surface form:
Penrose–Carter diagram
Schwarzschild Penrose diagram ⓘ |
| represents |
Cauchy horizons of a charged black hole
ⓘ
asymptotically flat regions ⓘ event horizons of a charged black hole ⓘ future null infinity ⓘ global causal structure of Reissner–Nordström spacetime ⓘ inner horizon of a charged black hole ⓘ outer horizon of a charged black hole ⓘ past null infinity ⓘ spacelike infinity ⓘ timelike infinity ⓘ timelike singularity ⓘ |
| shows |
black hole regions
ⓘ
causal relationships between events ⓘ infinite sequence of black hole and white hole regions ⓘ multiple asymptotic regions ⓘ null geodesics as 45-degree lines ⓘ spacelike curves as horizontal-like curves ⓘ timelike geodesics as vertical-like curves ⓘ white hole regions ⓘ |
| usedFor |
studying determinism breakdown at Cauchy horizons
ⓘ
studying geodesic completeness ⓘ visualizing horizons and singularities ⓘ |
| usedIn |
black hole physics
ⓘ
causal structure analysis ⓘ general relativity ⓘ theoretical astrophysics ⓘ |
| uses |
conformal compactification
ⓘ
null coordinates ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Reissner–Nordström Penrose diagram Description of subject: The Reissner–Nordström Penrose diagram is a causal spacetime diagram depicting the global structure of a charged, non-rotating black hole, including its multiple horizons and extended regions.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Schwarzschild Penrose diagram by having inner and outer horizons