Galactic rotation
E471606
Galactic rotation is the large-scale orbital motion of stars and gas around the center of a galaxy, revealing its mass distribution and the presence of dark matter.
Statements (55)
| Predicate | Object |
|---|---|
| instanceOf |
astrophysical phenomenon
ⓘ
galactic dynamics phenomenon ⓘ |
| appliesTo |
barred spiral galaxies
ⓘ
irregular galaxies ⓘ lenticular galaxies ⓘ spiral galaxies ⓘ the Milky Way NERFINISHED ⓘ |
| characterizedBy |
approximately flat outer rotation curves
ⓘ
non-Keplerian velocity profiles ⓘ rotation velocity as a function of radius ⓘ |
| dependsOn |
galactic halo properties
ⓘ
radial mass distribution ⓘ total galactic mass ⓘ |
| describes |
large-scale motion around galactic centers
ⓘ
orbital motion of gas in galaxies ⓘ orbital motion of stars in galaxies ⓘ |
| evidenceFor |
existence of dark matter
ⓘ
extended dark matter halos ⓘ |
| field |
astrophysics
ⓘ
galactic astronomy ⓘ |
| hasKeyConcept |
Keplerian decline
ⓘ
MOND NERFINISHED ⓘ Newtonian gravity NERFINISHED ⓘ baryonic matter ⓘ circular velocity ⓘ dark matter halo ⓘ differential rotation ⓘ flat rotation curve ⓘ mass-to-light ratio ⓘ modified gravity theories ⓘ orbital period ⓘ rotation curve ⓘ |
| influences |
galactic disk stability
ⓘ
orbital resonances in disks ⓘ spiral arm structure ⓘ star formation patterns ⓘ |
| modeledBy |
N-body simulations
ⓘ
hydrodynamical simulations ⓘ mass distribution models ⓘ |
| relatedTo |
Oort constants
NERFINISHED
ⓘ
Tully–Fisher relation NERFINISHED ⓘ dark matter ⓘ galactic gravitational potential ⓘ mass distribution in galaxies ⓘ rotation curves of galaxies ⓘ |
| reveals |
distribution of dark matter in galaxies
ⓘ
distribution of visible matter in galaxies ⓘ total mass of galaxies ⓘ |
| studiedUsing |
21 cm hydrogen line observations
ⓘ
Doppler shift measurements ⓘ optical spectroscopy ⓘ radio astronomy ⓘ |
| usedFor |
estimating galaxy masses
ⓘ
probing dark matter distribution ⓘ testing gravity theories ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.