Canis Major Overdensity
E459116
The Canis Major Overdensity is a debated stellar overdensity near the plane of the Milky Way, often interpreted as either the remnant core of a disrupted dwarf galaxy or a warp/flare feature of the Galactic disk.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Canis Major overdensity | 2 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
controversial astronomical object ⓘ stellar overdensity ⓘ |
| associatedWith |
Galactic flare
ⓘ
Galactic warp ⓘ Monoceros Ring NERFINISHED ⓘ |
| consideredCandidate |
disrupted dwarf galaxy remnant
ⓘ
outer disk substructure ⓘ |
| contains |
M-giant stars
ⓘ
old stellar populations ⓘ red clump stars ⓘ |
| discoveredBy |
Gérard F. Gilmore
NERFINISHED
ⓘ
Mike J. Irwin NERFINISHED ⓘ Rodrigo A. Ibata NERFINISHED ⓘ |
| discoveredUsing |
2MASS
NERFINISHED
ⓘ
Two Micron All Sky Survey NERFINISHED ⓘ |
| discoveryMethod | star count analysis ⓘ |
| discoveryYear | 2003 ⓘ |
| distanceFromEarth |
approximately 25,000 light-years
ⓘ
approximately 7 kiloparsecs ⓘ |
| galacticLatitude | about minus 8 degrees ⓘ |
| galacticLongitude | about 240 degrees ⓘ |
| galactocentricDistance | approximately 13 kiloparsecs ⓘ |
| hasAlternativeName |
CMa overdensity
NERFINISHED
ⓘ
Canis Major Dwarf Galaxy candidate NERFINISHED ⓘ |
| hasEstimatedStellarMass | on the order of 10^8 solar masses ⓘ |
| hasShape | elongated along the Galactic plane ⓘ |
| hasUncertainNature | true ⓘ |
| heliocentricDistance | approximately 7 kiloparsecs ⓘ |
| interpretedAs |
feature of the Galactic flare
ⓘ
feature of the Galactic warp ⓘ remnant core of a disrupted dwarf galaxy ⓘ |
| locatedIn |
Milky Way
ⓘ
outer Galactic disk ⓘ |
| locatedInConstellation | Canis Major NERFINISHED ⓘ |
| locatedNear | Galactic plane ⓘ |
| observedIn |
near-infrared wavelengths
ⓘ
optical wavelengths ⓘ |
| overlapsWith |
Galactic disk
ⓘ
Galactic warp region ⓘ |
| partOf | outer Milky Way substructures ⓘ |
| relatedTo |
Galactic accretion history
ⓘ
Sagittarius Dwarf Spheroidal Galaxy NERFINISHED ⓘ |
| studiedUsing |
color–magnitude diagrams
ⓘ
kinematic measurements ⓘ star counts in 2MASS survey ⓘ |
| subjectOf |
debate about Galactic structure interpretation
ⓘ
debate about its extragalactic origin ⓘ |
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Canis Major overdensity
this entity surface form:
Canis Major overdensity