Bootes I Dwarf Galaxy
E490823
Bootes I Dwarf Galaxy is a faint, spheroidal satellite galaxy of the Milky Way located in the constellation Boötes and known for its very low luminosity and dark-matter dominance.
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
dwarf spheroidal galaxy
ⓘ
ultra-faint dwarf galaxy ⓘ |
| absoluteMagnitudeV | about −5.8 ⓘ |
| alternativeName |
Boötes I
NERFINISHED
ⓘ
Boötes I dSph NERFINISHED ⓘ |
| belongsTo | Local Group NERFINISHED ⓘ |
| contains | very metal-poor stars ⓘ |
| darkMatterMass | of order 10^7 solar masses ⓘ |
| declination | approximately +14° ⓘ |
| discoveredBy |
V. Belokurov
NERFINISHED
ⓘ
collaborators in the Sloan Digital Sky Survey ⓘ |
| discoveryMethod | Sloan Digital Sky Survey data analysis ⓘ |
| discoveryYear | 2006 ⓘ |
| distanceFromEarth |
approximately 200,000 light-years
ⓘ
approximately 60 kiloparsecs ⓘ |
| environment | Milky Way outer halo NERFINISHED ⓘ |
| galaxyType | spheroidal ⓘ |
| halfLightRadius | about 200 parsecs ⓘ |
| hasProperty |
dark-matter dominated
ⓘ
faint ⓘ metal-poor ⓘ old stellar population ⓘ very low luminosity ⓘ |
| hostGalaxy | Milky Way NERFINISHED ⓘ |
| locatedInConstellation | Boötes NERFINISHED ⓘ |
| luminosity | about 10,000 times the luminosity of the Sun ⓘ |
| massToLightRatio |
of order hundreds in solar units
ⓘ
very high ⓘ |
| meanMetallicity | [Fe/H] around −2.5 ⓘ |
| morphologicalType | dSph ⓘ |
| namedAfter | constellation Boötes NERFINISHED ⓘ |
| observedInSurvey | Sloan Digital Sky Survey NERFINISHED ⓘ |
| orbitalRelation | satellite of the Milky Way halo ⓘ |
| redshift | approximately 0 ⓘ |
| researchInterest |
constraining galaxy formation in low-mass halos
ⓘ
studying early chemical enrichment ⓘ testing dark matter models ⓘ |
| rightAscension | approximately 14h 00m ⓘ |
| starFormationHistory |
dominated by ancient stars
ⓘ
little or no recent star formation ⓘ |
| stellarMass | of order 10^4 solar masses ⓘ |
| surfaceBrightness | extremely low ⓘ |
| velocityDispersion | a few kilometers per second ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.