Reticulum II Dwarf Galaxy
E505721
dark-matter-dominated galaxy
r-process-enhanced galaxy
satellite galaxy of the Milky Way
ultra-faint dwarf galaxy
Reticulum II Dwarf Galaxy is an ultra-faint satellite galaxy of the Milky Way notable for its extreme dark matter dominance and unusually high abundance of heavy r-process elements.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
dark-matter-dominated galaxy
ⓘ
r-process-enhanced galaxy ⓘ satellite galaxy of the Milky Way ⓘ ultra-faint dwarf galaxy ⓘ |
| absoluteMagnitudeV | about −3.6 ⓘ |
| belongsTo | Milky Way halo NERFINISHED ⓘ |
| contains | r-II stars ⓘ |
| declination | approximately −54° ⓘ |
| discoveredBy | Dark Energy Survey NERFINISHED ⓘ |
| discoveryMethod | wide-field photometric survey ⓘ |
| discoveryYear | 2015 ⓘ |
| distanceFromMilkyWay |
approximately 30 kiloparsecs
ⓘ
approximately 98,000 light-years ⓘ |
| galaxyType | dSph (dwarf spheroidal) ⓘ |
| hasAlternativeName |
Ret II
NERFINISHED
ⓘ
Reticulum II NERFINISHED ⓘ |
| hasProperty |
chemically homogeneous r-process pattern among enriched stars
ⓘ
compact spatial extent ⓘ contains r-process-enhanced stars ⓘ dynamically dominated by dark matter ⓘ extreme dark matter dominance ⓘ high abundance of r-process elements ⓘ high mass-to-light ratio ⓘ low gas content ⓘ low velocity dispersion of stars ⓘ old stellar population ⓘ very low stellar mass ⓘ very low surface brightness ⓘ very metal-poor stellar population ⓘ |
| locatedIn | constellation Reticulum NERFINISHED ⓘ |
| luminosityClass | ultra-faint ⓘ |
| memberOf | Local Group NERFINISHED ⓘ |
| metallicity | [Fe/H] around −2.5 dex (typical) ⓘ |
| notableFor |
being a prime candidate site of a past neutron star merger
ⓘ
hosting stars with extreme r-process enhancement ⓘ strong indirect evidence for dark matter ⓘ |
| observedIn |
gamma-ray searches for dark matter annihilation
ⓘ
optical wavelengths ⓘ |
| rightAscension | approximately 03h 35m ⓘ |
| satelliteOf | Milky Way NERFINISHED ⓘ |
| scientificInterest |
chemical evolution of ultra-faint dwarfs
ⓘ
indirect dark matter detection via gamma rays ⓘ origin of heavy elements beyond iron ⓘ |
| surveyDesignation | DES J0335.6−5403 NERFINISHED ⓘ |
| usedFor |
constraints on dark matter particle properties
ⓘ
studies of r-process nucleosynthesis ⓘ tests of galaxy formation at the lowest masses ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.