Peebles–Yu model of photon–baryon fluid
E925296
The Peebles–Yu model of the photon–baryon fluid is a cosmological framework that describes the coupled evolution of photons and baryons in the early universe, providing a basis for understanding the origin of cosmic microwave background anisotropies and acoustic peaks.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Peebles–Yu model of photon–baryon fluid canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11410310 — 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: Peebles–Yu model of photon–baryon fluid Context triple: [Phillip James Edwin Peebles, notableWork, Peebles–Yu model of photon–baryon fluid]
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A.
FLRW cosmological models
FLRW cosmological models are a family of solutions to Einstein’s field equations that describe a homogeneous and isotropic expanding or contracting universe, forming the standard framework for modern cosmology.
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B.
Schwarzschild–Milne equations
The Schwarzschild–Milne equations are fundamental integro-differential equations in radiative transfer theory that describe the propagation and scattering of radiation through a plane-parallel, absorbing and emitting medium.
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C.
Zeldovich approximation in large-scale structure formation
The Zeldovich approximation in large-scale structure formation is a seminal analytical model in cosmology that predicts how small initial density perturbations in the early universe evolve into the cosmic web of sheets, filaments, and clusters of galaxies.
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D.
Bardeen–Stephen model
The Bardeen–Stephen model is a theoretical framework in superconductivity that describes the motion and dissipation of energy by magnetic flux vortices in type-II superconductors.
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E.
Tolman surface brightness test
The Tolman surface brightness test is an observational cosmology method that checks whether the universe is expanding by examining how the surface brightness of distant galaxies diminishes with redshift.
- 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: Peebles–Yu model of photon–baryon fluid Target entity description: The Peebles–Yu model of the photon–baryon fluid is a cosmological framework that describes the coupled evolution of photons and baryons in the early universe, providing a basis for understanding the origin of cosmic microwave background anisotropies and acoustic peaks.
-
A.
FLRW cosmological models
FLRW cosmological models are a family of solutions to Einstein’s field equations that describe a homogeneous and isotropic expanding or contracting universe, forming the standard framework for modern cosmology.
-
B.
Schwarzschild–Milne equations
The Schwarzschild–Milne equations are fundamental integro-differential equations in radiative transfer theory that describe the propagation and scattering of radiation through a plane-parallel, absorbing and emitting medium.
-
C.
Zeldovich approximation in large-scale structure formation
The Zeldovich approximation in large-scale structure formation is a seminal analytical model in cosmology that predicts how small initial density perturbations in the early universe evolve into the cosmic web of sheets, filaments, and clusters of galaxies.
-
D.
Bardeen–Stephen model
The Bardeen–Stephen model is a theoretical framework in superconductivity that describes the motion and dissipation of energy by magnetic flux vortices in type-II superconductors.
-
E.
Tolman surface brightness test
The Tolman surface brightness test is an observational cosmology method that checks whether the universe is expanding by examining how the surface brightness of distant galaxies diminishes with redshift.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
cosmological model
ⓘ
theoretical framework ⓘ |
| appliesTo | early universe ⓘ |
| assumes |
dominance of radiation over matter at very early times
ⓘ
small perturbations around a homogeneous and isotropic background ⓘ tight-coupling approximation for Thomson scattering ⓘ tightly coupled photons and baryons before recombination ⓘ |
| basedOn | linear perturbation theory ⓘ |
| concerns |
physics of last scattering surface
ⓘ
pre-recombination era ⓘ |
| connectedTo |
standard model of cosmology
ⓘ
ΛCDM cosmology through CMB analysis ⓘ |
| describes |
coupled evolution of photons and baryons
ⓘ
photon–baryon fluid ⓘ |
| developedBy |
J. T. Yu
NERFINISHED
ⓘ
P. J. E. Peebles NERFINISHED ⓘ |
| explains |
acoustic peaks in the cosmic microwave background power spectrum
ⓘ
cosmic microwave background anisotropies ⓘ |
| field |
cosmology
ⓘ
physical cosmology ⓘ |
| frameworkFor |
interpreting CMB temperature power spectrum
ⓘ
linking primordial perturbations to observed CMB features ⓘ |
| historicalSignificance | early quantitative model of CMB anisotropy formation ⓘ |
| includes |
acoustic oscillations of the photon–baryon fluid
ⓘ
baryon inertia effects ⓘ gravitational driving of perturbations ⓘ radiation pressure effects ⓘ |
| incorporates |
damping effects such as Silk damping qualitatively
ⓘ
sound speed of photon–baryon fluid ⓘ |
| influenced | later Boltzmann codes for CMB anisotropy calculations ⓘ |
| predicts |
phase and amplitude of acoustic oscillations
ⓘ
series of acoustic peaks in CMB angular power spectrum ⓘ |
| providesBasisFor |
understanding acoustic oscillations in the photon–baryon fluid
ⓘ
understanding origin of CMB anisotropies ⓘ |
| relatedTo |
baryon acoustic oscillations
ⓘ
cosmic microwave background ⓘ |
| relates |
photon perturbations to gravitational potential perturbations
ⓘ
photon temperature perturbations to density perturbations ⓘ |
| timePeriodOfDevelopment | late 1960s ⓘ |
| treats | photon–baryon mixture as a single fluid on large scales ⓘ |
| usedFor |
estimating positions of CMB acoustic peaks
ⓘ
understanding dependence of peak structure on cosmological parameters ⓘ |
| uses | Friedmann–Robertson–Walker background cosmology NERFINISHED ⓘ |
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: Peebles–Yu model of photon–baryon fluid Description of subject: The Peebles–Yu model of the photon–baryon fluid is a cosmological framework that describes the coupled evolution of photons and baryons in the early universe, providing a basis for understanding the origin of cosmic microwave background anisotropies and acoustic peaks.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.