Sagittarius Dwarf Spheroidal Galaxy
E21424
The Sagittarius Dwarf Spheroidal Galaxy is a small, elongated satellite galaxy currently being tidally disrupted and absorbed by the Milky Way.
Observed surface forms (2)
| Surface form | Occurrences |
|---|---|
| Sagittarius Dwarf Elliptical Galaxy | 1 |
| Sagittarius dSph | 1 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
dwarf spheroidal galaxy
ⓘ
satellite galaxy ⓘ stellar stream progenitor ⓘ |
| alsoKnownAs |
SagDEG
ⓘ
Sagittarius Dwarf Spheroidal Galaxy ⓘ
surface form:
Sagittarius Dwarf Elliptical Galaxy
Sagittarius Dwarf Spheroidal Galaxy ⓘ
surface form:
Sagittarius dSph
|
| associatedGlobularCluster |
Arp 2
ⓘ
M54 ⓘ Terzan 7 ⓘ Terzan 8 ⓘ |
| belongsTo | Local Group ⓘ |
| contains |
globular clusters
ⓘ
metal-poor stars ⓘ old stellar population ⓘ |
| darkMatterDominated | true ⓘ |
| discoveredBy |
Geraint F. Lewis
ⓘ
Michael J. Irwin ⓘ Rodrigo Ibata ⓘ |
| discoveryMethod | star count overdensity in Milky Way halo ⓘ |
| discoveryYear | 1994 ⓘ |
| disruptionCause | Milky Way tidal forces ⓘ |
| distanceFromEarth_approx | 70000 light-years ⓘ |
| distanceFromGalacticCenter_approx | 16000–20000 light-years ⓘ |
| environment | Milky Way satellite system ⓘ |
| forms | Sagittarius Stream ⓘ |
| galacticComponent | Milky Way stellar halo ⓘ |
| hostGalaxy | Milky Way ⓘ |
| importanceInAstrophysics |
used to probe Milky Way dark matter halo
ⓘ
used to study galaxy accretion and tidal disruption ⓘ |
| interactionWithMilkyWay | currently being accreted by the Milky Way ⓘ |
| isSatelliteOf | Milky Way ⓘ |
| kinematics | shows tidal tails extending around the Milky Way ⓘ |
| locatedIn |
Sagittarius
ⓘ
surface form:
Sagittarius constellation
|
| luminosityClass | low-luminosity galaxy ⓘ |
| metallicity | low average metallicity compared to the Sun ⓘ |
| morphologicalType | dSph ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| orbitalPlane | nearly polar orbit around Milky Way ⓘ |
| orbitalStatus | being tidally disrupted by the Milky Way ⓘ |
| roleInGalaxyEvolution |
contributes globular clusters to Milky Way system
ⓘ
contributes stars to Milky Way halo ⓘ |
| shape | elongated ⓘ |
| starFormationActivity | little or no current star formation ⓘ |
| stellarMass_approx | 10^7 solar masses ⓘ |
| tidalDebris | stellar streams wrapping around the Milky Way ⓘ |
| visibility | obscured by Milky Way disk and bulge ⓘ |
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Sagittarius dSph
this entity surface form:
Sagittarius Dwarf Elliptical Galaxy