Segue 1 Dwarf Galaxy
E459115
Segue 1 Dwarf Galaxy is an ultra-faint dwarf satellite galaxy of the Milky Way, notable for its extremely low luminosity and high dark matter content.
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
dwarf galaxy ⓘ satellite galaxy ⓘ ultra-faint dwarf galaxy ⓘ |
| absoluteMagnitudeV_approx | -1.5 ⓘ |
| angularSize_approx | 4 arcminutes ⓘ |
| apparentMagnitudeV_approx | 17.7 ⓘ |
| classifiedAs | ultra-faint dwarf spheroidal galaxy ⓘ |
| contains | very few resolved stars ⓘ |
| darkMatterDominated | true ⓘ |
| discoveredBy |
SEGUE survey
NERFINISHED
ⓘ
Sloan Digital Sky Survey NERFINISHED ⓘ |
| discoveryMethod | photometric survey ⓘ |
| discoveryYear | 2007 ⓘ |
| distanceFromEarth_approx | 23000 light-years ⓘ |
| distanceFromGalacticCenter_approx | 28 kiloparsecs ⓘ |
| distanceFromSun_approx | 23 kiloparsecs ⓘ |
| environment | Galactic halo NERFINISHED ⓘ |
| gasContent | gas-poor ⓘ |
| halfLightRadius_approx | 30 parsecs ⓘ |
| hasAlternativeName |
Segue 1
NERFINISHED
ⓘ
Segue 1 dSph NERFINISHED ⓘ |
| hasScientificInterestIn |
chemical evolution of ultra-faint dwarfs
ⓘ
dark matter particle constraints ⓘ galaxy formation in low-mass halos ⓘ |
| hasVelocityDispersion_approx | 3–4 km/s ⓘ |
| locatedInConstellation | Leo NERFINISHED ⓘ |
| massToLightRatio_approx | >1000 ⓘ |
| memberOf |
Local Group
NERFINISHED
ⓘ
Milky Way satellite system ⓘ |
| metallicity_approx | [Fe/H] ≈ -2.5 ⓘ |
| notableFor |
extremely low luminosity
ⓘ
one of the faintest known galaxies ⓘ very high dark matter content ⓘ |
| observedIn |
near-infrared wavelengths
ⓘ
optical wavelengths ⓘ |
| orbitsWithin | Milky Way halo NERFINISHED ⓘ |
| redshift_approx | z ≈ 0 ⓘ |
| satelliteOf | Milky Way NERFINISHED ⓘ |
| starFormationActivity | no recent star formation ⓘ |
| stellarMass_approx | 1000 solar masses ⓘ |
| stellarPopulation |
old stars
ⓘ
very metal-poor stars ⓘ |
| totalLuminosity_approx | 340 solar luminosities ⓘ |
| usedAs |
laboratory for dark matter studies
ⓘ
probe of galaxy formation at low mass scales ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.