Leading Arm
E487062
The Leading Arm is a stream of gas extending ahead of the Magellanic Clouds as they orbit the Milky Way, thought to be stripped from these dwarf galaxies by gravitational and hydrodynamic interactions.
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
astrophysical gas structure
ⓘ
gaseous tidal feature ⓘ high‑velocity cloud complex ⓘ |
| angularExtent | over 60 degrees on the sky ⓘ |
| associatedWith |
Large Magellanic Cloud
NERFINISHED
ⓘ
Small Magellanic Cloud NERFINISHED ⓘ |
| composedOf |
ionized gas
ⓘ
neutral hydrogen gas ⓘ |
| contains |
cold neutral medium clumps
ⓘ
warm ionized gas ⓘ |
| contrastsWith | Magellanic Stream NERFINISHED ⓘ |
| contributesTo | gas accretion onto Milky Way ⓘ |
| discoveredBy | radio observations of H I ⓘ |
| distanceEstimate | approximately 20–60 kiloparsecs ⓘ |
| extendsAheadOf | Magellanic Clouds NERFINISHED ⓘ |
| extendsOver | tens of kiloparsecs ⓘ |
| gasPhase | multi‑phase medium ⓘ |
| hasKinematics |
distinct from Galactic disk rotation
ⓘ
negative Galactic‑standard‑of‑rest velocities in some regions ⓘ |
| hasPhysicalProcessOrigin |
gravitational interactions with Milky Way
ⓘ
hydrodynamic interactions with Milky Way halo gas ⓘ ram‑pressure stripping ⓘ tidal stripping ⓘ |
| hasSubstructure |
Leading Arm I
ⓘ
Leading Arm II ⓘ Leading Arm III NERFINISHED ⓘ Leading Arm IV ⓘ |
| interactsWith |
Milky Way circumgalactic medium
ⓘ
Milky Way disk gas ⓘ |
| kinematicallyRelatedTo | Magellanic Stream NERFINISHED ⓘ |
| locatedIn | Milky Way halo NERFINISHED ⓘ |
| metallicity |
similar to Magellanic Clouds
ⓘ
sub‑solar metallicity ⓘ |
| modeledBy |
N‑body simulations of Magellanic System
ⓘ
hydrodynamical simulations of Milky Way–Magellanic interaction ⓘ |
| observationalChallenge | confusion with Galactic H I emission ⓘ |
| observedAs | high‑velocity H I emission ⓘ |
| observedWith |
Arecibo Observatory
NERFINISHED
ⓘ
Green Bank Telescope NERFINISHED ⓘ Hubble Space Telescope ultraviolet spectroscopy ⓘ Parkes radio telescope NERFINISHED ⓘ |
| orbitsWith | Magellanic Clouds NERFINISHED ⓘ |
| originatesFrom | gas stripped from Magellanic Clouds ⓘ |
| partOf | Magellanic System NERFINISHED ⓘ |
| relevance | tests models of Milky Way mass and halo structure ⓘ |
| studiedInContextOf |
circumgalactic medium
ⓘ
galaxy interaction dynamics ⓘ gas accretion onto galaxies ⓘ |
| tracedBy | 21‑cm line of neutral hydrogen ⓘ |
| velocityFrame | Local Standard of Rest NERFINISHED ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.