CMa Dwarf
E118796
CMa Dwarf is a small, nearby satellite galaxy of the Milky Way believed to be in the process of being tidally disrupted and absorbed.
All labels observed (1)
| Label | Occurrences |
|---|---|
| CMa Dwarf canonical | 1 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
dwarf galaxy
ⓘ
satellite galaxy ⓘ stellar overdensity ⓘ |
| absoluteMagnitudeV | around −14 ⓘ |
| alternateName |
Canis Major Dwarf Galaxy
ⓘ
surface form:
Canis Major Dwarf
Canis Major Dwarf Galaxy ⓘ Canis Major Overdensity ⓘ |
| associatedWith | Monoceros Ring ⓘ |
| containsStellarPopulation |
M-giant stars
ⓘ
intermediate-age stars ⓘ old stars ⓘ red giant stars ⓘ |
| controversial | true ⓘ |
| controversyTopic | whether it is a distinct dwarf galaxy or a warp/flare of the Milky Way disk ⓘ |
| discoveredBy | Martin et al. ⓘ |
| discoveryMethod | star count analysis in 2MASS survey ⓘ |
| discoveryYear | 2003 ⓘ |
| distanceFromEarth | ~25,000 light-years ⓘ |
| distanceFromGalacticCenter | ~42,000 light-years ⓘ |
| evidenceForAccretion |
kinematics of M-giant stars
ⓘ
spatial overdensity of stars ⓘ |
| galacticLatitude | low galactic latitude ⓘ |
| hasRadialVelocitySignature | distinct from typical Milky Way disk stars ⓘ |
| interactionWith |
Milky Way dark matter halo
ⓘ
surface form:
Milky Way tidal field
|
| locatedIn |
Galactic anticenter region
ⓘ
Milky Way stellar halo ⓘ
surface form:
Milky Way halo
|
| locatedInConstellation | Canis Major ⓘ |
| massEstimate | on the order of 10^8–10^9 solar masses ⓘ |
| metallicity | relatively metal-rich for a dwarf galaxy ⓘ |
| obscuredBy |
Galactic disk
ⓘ
interstellar dust ⓘ |
| observedIn | near-infrared wavelengths ⓘ |
| observedWith |
Two Micron All Sky Survey
ⓘ
surface form:
2MASS survey
optical photometric surveys ⓘ spectroscopic follow-up observations ⓘ |
| orbitalStatus | in process of being accreted by the Milky Way ⓘ |
| possibleProgenitorOf | Monoceros Ring ⓘ |
| produces | stellar tidal streams ⓘ |
| relatedStructure |
Galactic flare
ⓘ
Galactic warp ⓘ |
| researchTopic |
hierarchical galaxy formation
ⓘ
origin of outer Milky Way disk structures ⓘ satellite accretion in the Milky Way ⓘ |
| roleInAstrophysics | example of ongoing minor merger with the Milky Way ⓘ |
| satelliteOf | Milky Way ⓘ |
| shape | elongated and distorted by tides ⓘ |
| status | tidally disrupting ⓘ |
| stellarContent | dominantly old and intermediate-age populations ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.