Virgo Overdensity
E502432
The Virgo Overdensity is a large, diffuse concentration of stars in the Milky Way’s outer regions, thought to be the remnant of a disrupted dwarf galaxy or stellar stream.
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
Galactic halo substructure
ⓘ
stellar overdensity ⓘ stellar stream candidate ⓘ |
| angularSize | over 1000 square degrees ⓘ |
| appearsInConstellation | Virgo NERFINISHED ⓘ |
| characterizedBy |
diffuse stellar distribution
ⓘ
large spatial extent ⓘ low surface brightness ⓘ |
| composedMostlyOf |
metal-poor stars
ⓘ
old stars ⓘ |
| discoveredUsing | Sloan Digital Sky Survey NERFINISHED ⓘ |
| distanceFromGalacticCenter | approximately 6–20 kiloparsecs above or below the Galactic plane ⓘ |
| distanceFromSun | approximately 6–20 kiloparsecs ⓘ |
| evidenceFor | ongoing assembly of the Milky Way halo ⓘ |
| extendsIntoConstellation |
Boötes
NERFINISHED
ⓘ
Coma Berenices NERFINISHED ⓘ Leo NERFINISHED ⓘ |
| hasAlternativeName |
VOD
NERFINISHED
ⓘ
Virgo Stellar Overdensity NERFINISHED ⓘ |
| hasKinematics |
distinct from typical Galactic disk stars
ⓘ
suggestive of accreted origin ⓘ |
| hasUncertain |
exact three-dimensional shape
ⓘ
precise progenitor system ⓘ total stellar mass ⓘ |
| identifiedBy |
overdensity of F-type main-sequence turnoff stars
ⓘ
overdensity of RR Lyrae stars ⓘ |
| locatedIn |
Galactic halo
NERFINISHED
ⓘ
Milky Way ⓘ outer regions of the Milky Way ⓘ |
| namedAfter | Virgo constellation NERFINISHED ⓘ |
| observedIn | optical wavelengths ⓘ |
| relatedTo |
Monoceros Ring
NERFINISHED
ⓘ
Sagittarius Stream NERFINISHED ⓘ other Milky Way halo substructures ⓘ |
| significanceInAstrophysics |
constrains models of the Galactic potential
ⓘ
tests hierarchical galaxy formation scenarios ⓘ traces past accretion events onto the Milky Way ⓘ |
| stellarPopulationType | halo stars ⓘ |
| studiedUsing |
photometric surveys
ⓘ
spectroscopic follow-up observations ⓘ |
| thoughtToBe |
evidence of hierarchical galaxy formation
ⓘ
remnant of a disrupted dwarf galaxy ⓘ remnant of a stellar stream ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.