Local Bubble
E18766
The Local Bubble is a cavity of hot, low-density gas in the interstellar medium surrounding the Sun, likely created by multiple ancient supernova explosions.
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
cavity in the interstellar medium
→
interstellar medium structure → |
| affects |
distribution of neutral hydrogen around the Sun
→
local soft X-ray background → |
| age |
on the order of 10 to 20 million years
→
|
| averageHydrogenNumberDensity |
about 0.005 atoms per cubic centimeter
→
|
| connectedTo |
Loop I superbubble
→
other nearby superbubbles → |
| contains |
G cloud
→
Local Interstellar Cloud → other nearby interstellar clouds → |
| createdBy |
multiple supernova explosions
→
stellar winds from massive stars → |
| distanceFromSunToWall |
roughly 100 to 200 light-years in many directions
→
|
| gasDensity |
much lower than average interstellar medium density
→
|
| hasAlternativeName |
Local Hot Bubble
→
|
| hasApproximateDiameter |
about 600 light-years
→
|
| hasApproximateRadius |
about 300 light-years
→
|
| hasAsComponent |
hot ionized plasma
→
very low-density neutral gas → |
| hasBoundary |
denser interstellar clouds
→
|
| hasKinematicRelationWith |
motion of the Sun through the local interstellar medium
→
|
| hasProperty |
hot gas
→
low-density gas → |
| hasUncertainBoundary |
yes
→
|
| influences |
local interstellar radiation field
→
propagation of cosmic rays near the Sun → structure of nearby interstellar clouds → |
| isExampleOf |
superbubble
→
supernova-driven cavity → |
| likelyOriginRegion |
Scorpius–Centaurus OB association
→
|
| locatedIn |
Milky Way
→
Orion Arm → |
| observedVia |
21-cm neutral hydrogen observations
→
soft X-ray background emission → ultraviolet absorption lines → |
| partOf |
local interstellar medium
→
|
| relevantFor |
models of heliosphere–ISM interaction
→
understanding the Sun’s galactic environment → |
| shape |
roughly peanut-shaped
→
|
| studiedIn |
X-ray astronomy
→
galactic structure studies → interstellar medium research → |
| surroundedBy |
denser, cooler interstellar gas
→
|
| surrounds |
Sun
→
|
| temperature |
about 1 million kelvin
→
|