Jeans instability
E290120
Jeans instability is a gravitational phenomenon in astrophysics where regions within a gas cloud become unstable and collapse under their own gravity, leading to the formation of structures like stars and galaxies.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Jeans instability canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T2707261 — 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.
Target entity: Jeans instability Context triple: [Jeans mass, relatedTo, Jeans instability]
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A.
Rayleigh–Taylor instability
Rayleigh–Taylor instability is a fluid dynamics phenomenon in which the interface between two fluids of different densities becomes unstable when the lighter fluid pushes against the heavier one, leading to complex mixing patterns.
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B.
Chandrasekhar–Friedman–Schutz instability
The Chandrasekhar–Friedman–Schutz instability is a gravitational-radiation-driven instability in rotating stars that can cause certain oscillation modes to grow by emitting gravitational waves.
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C.
Saffman–Taylor instability
The Saffman–Taylor instability is a fluid dynamics phenomenon in which a less viscous fluid penetrating a more viscous one in a confined geometry leads to finger-like interfacial patterns, often called viscous fingering.
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D.
Interaction of solitons in a collisionless plasma and the recurrence of initial states
"Interaction of solitons in a collisionless plasma and the recurrence of initial states" is a landmark 1965 paper by Norman J. Zabusky and Martin Kruskal that introduced the concept of solitons and demonstrated their particle-like interactions and recurrence behavior in nonlinear wave systems.
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E.
Commission H – Waves in Plasmas
Commission H – Waves in Plasmas is a specialized body within the International Union of Radio Science that focuses on the study and advancement of wave phenomena in plasmas and related space and laboratory environments.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: Jeans instability Target entity description: Jeans instability is a gravitational phenomenon in astrophysics where regions within a gas cloud become unstable and collapse under their own gravity, leading to the formation of structures like stars and galaxies.
-
A.
Rayleigh–Taylor instability
Rayleigh–Taylor instability is a fluid dynamics phenomenon in which the interface between two fluids of different densities becomes unstable when the lighter fluid pushes against the heavier one, leading to complex mixing patterns.
-
B.
Chandrasekhar–Friedman–Schutz instability
The Chandrasekhar–Friedman–Schutz instability is a gravitational-radiation-driven instability in rotating stars that can cause certain oscillation modes to grow by emitting gravitational waves.
-
C.
Saffman–Taylor instability
The Saffman–Taylor instability is a fluid dynamics phenomenon in which a less viscous fluid penetrating a more viscous one in a confined geometry leads to finger-like interfacial patterns, often called viscous fingering.
-
D.
Interaction of solitons in a collisionless plasma and the recurrence of initial states
"Interaction of solitons in a collisionless plasma and the recurrence of initial states" is a landmark 1965 paper by Norman J. Zabusky and Martin Kruskal that introduced the concept of solitons and demonstrated their particle-like interactions and recurrence behavior in nonlinear wave systems.
-
E.
Commission H – Waves in Plasmas
Commission H – Waves in Plasmas is a specialized body within the International Union of Radio Science that focuses on the study and advancement of wave phenomena in plasmas and related space and laboratory environments.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
astrophysical instability
ⓘ
gravitational instability ⓘ |
| appliesTo |
interstellar medium
ⓘ
molecular clouds ⓘ self-gravitating gas clouds ⓘ |
| assumes |
infinite homogeneous medium
ⓘ
linear perturbation theory ⓘ small perturbations ⓘ |
| cause | gravitational collapse ⓘ |
| characterizedBy |
Jeans length
ⓘ
Jeans mass ⓘ |
| criterion |
perturbation mass greater than Jeans mass
ⓘ
perturbation size greater than Jeans length ⓘ |
| dependsOn |
gas density
ⓘ
gas temperature ⓘ mass of the perturbation ⓘ size of the perturbation ⓘ sound speed in the gas ⓘ |
| field |
astrophysics
ⓘ
cosmology ⓘ |
| governingEquations |
Euler equations
ⓘ
surface form:
Euler equation
Poisson equation for gravity ⓘ continuity equation ⓘ fluid equations ⓘ |
| historicalPeriod | early 20th century ⓘ |
| influencedBy |
magnetic fields
ⓘ
rotation of the gas cloud ⓘ turbulence ⓘ |
| namedAfter | James Jeans ⓘ |
| namedEntity | true ⓘ |
| occursIn |
early universe density fluctuations
ⓘ
star-forming regions ⓘ |
| occursWhen | self-gravity exceeds pressure support ⓘ |
| opposedBy | pressure gradients ⓘ |
| relatedTo |
Jeans swindle
ⓘ
cosmological perturbation theory ⓘ gravitational collapse ⓘ structure formation in the universe ⓘ |
| resultsIn |
formation of galaxies
ⓘ
formation of stellar clusters ⓘ fragmentation of gas clouds ⓘ star formation ⓘ |
| stabilizedBy |
gas pressure
ⓘ
sound waves ⓘ thermal motions ⓘ |
| timescale | free-fall time ⓘ |
| usedFor |
estimating minimum mass for star formation
ⓘ
modeling fragmentation of molecular clouds ⓘ understanding galaxy formation ⓘ |
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.
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.
Subject: Jeans instability Description of subject: Jeans instability is a gravitational phenomenon in astrophysics where regions within a gas cloud become unstable and collapse under their own gravity, leading to the formation of structures like stars and galaxies.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.