Einasto profile
E237662
The Einasto profile is a mathematical model used in astrophysics to describe how the density of dark matter and stars varies smoothly with distance from the centers of galaxies and galaxy clusters.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Einasto profile canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T2141559 — 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: Einasto profile Context triple: [Jaan Einasto, notableFor, Einasto profile]
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A.
ASTRO
ASTRO is the leading professional organization in the United States for radiation oncologists and other specialists involved in radiation therapy for cancer and other diseases.
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B.
asteroid 1501 Baade
Asteroid 1501 Baade is a main-belt asteroid named in honor of the German astronomer Walter Baade, known for his work on stellar populations and the scale of the universe.
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C.
Leo I Dwarf Galaxy
Leo I Dwarf Galaxy is a faint, spheroidal satellite galaxy of the Milky Way located in the constellation Leo and belonging to the Local Group of galaxies.
-
D.
Starro
Starro is a giant, telepathic alien starfish supervillain from DC Comics known for controlling minds and serving as a major threat to superhero teams like the Justice League.
-
E.
Udir
Udir is the commonly used abbreviation for the Norwegian Directorate for Education and Training, the national authority responsible for implementing and overseeing Norway’s education policy.
- 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: Einasto profile Target entity description: The Einasto profile is a mathematical model used in astrophysics to describe how the density of dark matter and stars varies smoothly with distance from the centers of galaxies and galaxy clusters.
-
A.
ASTRO
ASTRO is the leading professional organization in the United States for radiation oncologists and other specialists involved in radiation therapy for cancer and other diseases.
-
B.
asteroid 1501 Baade
Asteroid 1501 Baade is a main-belt asteroid named in honor of the German astronomer Walter Baade, known for his work on stellar populations and the scale of the universe.
-
C.
Leo I Dwarf Galaxy
Leo I Dwarf Galaxy is a faint, spheroidal satellite galaxy of the Milky Way located in the constellation Leo and belonging to the Local Group of galaxies.
-
D.
Starro
Starro is a giant, telepathic alien starfish supervillain from DC Comics known for controlling minds and serving as a major threat to superhero teams like the Justice League.
-
E.
Udir
Udir is the commonly used abbreviation for the Norwegian Directorate for Education and Training, the national authority responsible for implementing and overseeing Norway’s education policy.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
astrophysical model
ⓘ
density profile ⓘ mathematical model ⓘ |
| advantageOver | Navarro–Frenk–White profile in fitting simulated dark matter halos ⓘ |
| appliesTo |
bulges of spiral galaxies
ⓘ
elliptical galaxies ⓘ galactic dark matter halos ⓘ galaxy clusters ⓘ |
| assumes | spherical symmetry in its simplest form ⓘ |
| canBeGeneralizedTo | axisymmetric systems ⓘ |
| comparedTo | Navarro–Frenk–White profile ⓘ |
| contrastWith |
isothermal sphere profile
ⓘ
power-law density profiles ⓘ |
| dependsOn | radius from system center ⓘ |
| describes | smooth variation of density with radius ⓘ |
| describesComponent |
inner regions of dark matter halos
ⓘ
outer regions of dark matter halos ⓘ |
| field | astrophysics ⓘ |
| hasFunctionalForm | ρ(r) = ρ_e · exp{−d_n[(r/r_e)^{1/n} − 1]} ⓘ |
| hasParameter |
d_n
ⓘ
n ⓘ r_e ⓘ ρ_e ⓘ |
| introducedInContextOf | galactic structure studies ⓘ |
| mathematicalType | exponential of a power-law in radius ⓘ |
| namedAfter | Jaan Einasto ⓘ |
| originCountryOfEponym | Estonia ⓘ |
| parameterMeaning |
d_n is a constant fixed by n
ⓘ
n is a shape parameter ⓘ r_e is a scale radius ⓘ ρ_e is the density at radius r_e ⓘ |
| property |
curved logarithmic slope
ⓘ
finite central density ⓘ monotonically decreasing density with radius ⓘ spherically symmetric in its standard form ⓘ |
| relatedConcept |
Sérsic profile
ⓘ
linked to:
Einasto density profile
|
| relationship | mathematically analogous to the Sérsic profile in 3D ⓘ |
| scaleBehavior | logarithmic slope varies continuously with radius ⓘ |
| timePeriodOfIntroduction | 1960s ⓘ |
| typicalUseCase |
fitting observed galaxy mass distributions
ⓘ
fitting simulated ΛCDM dark matter halos ⓘ |
| usedFor |
describing radial density profiles of galaxies
ⓘ
describing radial density profiles of galaxy clusters ⓘ modeling dark matter density distributions ⓘ modeling stellar density distributions ⓘ |
| usedIn |
analysis of rotation curves of galaxies
ⓘ
cosmological N-body simulations ⓘ dark matter halo characterization ⓘ gravitational lensing studies ⓘ mass modeling of galaxy clusters ⓘ |
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: Einasto profile Description of subject: The Einasto profile is a mathematical model used in astrophysics to describe how the density of dark matter and stars varies smoothly with distance from the centers of galaxies and galaxy clusters.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.