Burkert profile
E820923
The Burkert profile is a cored dark matter halo density model commonly used in astrophysics to describe the flat central density distributions inferred from galaxy rotation curves.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
astrophysical model
ⓘ
dark matter halo density profile ⓘ |
| addresses | core–cusp problem ⓘ |
| appliesTo |
dwarf spheroidal galaxies
ⓘ
late-type spiral galaxies ⓘ |
| assumes | spherical symmetry ⓘ |
| asymptoticBehavior | ρ(r) ∝ r⁻³ at large radii ⓘ |
| category |
dark matter phenomenology
ⓘ
galactic structure models ⓘ |
| centralDensity | ρ₀ ⓘ |
| centralSlope | 0 ⓘ |
| comparedWith |
Einasto profile
NERFINISHED
ⓘ
isothermal sphere profile ⓘ |
| contrastsWith |
Navarro–Frenk–White profile
NERFINISHED
ⓘ
cuspy dark matter halo profiles ⓘ |
| coreDensityRadiusProduct | approximately constant across galaxies (empirical claim) ⓘ |
| densityExpression | ρ(x) = ρ₀ / [(1 + x)(1 + x²)] ⓘ |
| describes |
cored dark matter halo
ⓘ
flat central density distribution ⓘ |
| dimensionlessRadius | x = r/r₀ ⓘ |
| fits |
rotation curves of dwarf galaxies
ⓘ
rotation curves of low surface brightness galaxies ⓘ |
| hasCore | constant-density core ⓘ |
| hasCoreRadius | r₀ ⓘ |
| hasDensityCore | non-singular center ⓘ |
| hasFunctionalForm | ρ(r) = ρ₀ / [(1 + r/r₀)(1 + (r/r₀)²)] ⓘ |
| hasParameter |
r₀
ⓘ
ρ₀ ⓘ |
| implies | approximately flat rotation curves in inner regions ⓘ |
| introducedBy | Andreas Burkert NERFINISHED ⓘ |
| introducedIn | 1995 ⓘ |
| massProfile | M(r) = 4π ∫₀ʳ ρ(r′) r′² dr′ ⓘ |
| mathematicalForm | two-parameter density profile ⓘ |
| motivatedBy | galaxy rotation curves ⓘ |
| namedAfter | Andreas Burkert NERFINISHED ⓘ |
| outerSlope | -3 ⓘ |
| publication | Burkert 1995, Astrophysical Journal Letters NERFINISHED ⓘ |
| relatedConcept |
cored halo
ⓘ
dark matter distribution in galaxies ⓘ halo core radius ⓘ |
| usedFor |
deriving dark matter halo masses
ⓘ
fitting observed rotation curves ⓘ mass modeling of galaxies ⓘ |
| usedIn |
astrophysics
ⓘ
dark matter halo modeling ⓘ empirical scaling relations of dark matter halos ⓘ galaxy dynamics ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.