Local Cavity
E459062
The Local Cavity is a low-density region of interstellar space surrounding the Solar System, largely cleared of gas and dust by past supernovae and stellar winds.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Local Cavity canonical | 1 |
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
astrophysical cavity
ⓘ
interstellar medium structure ⓘ low-density region of interstellar space ⓘ |
| affects |
distribution of interstellar dust near the Sun
ⓘ
local interstellar radiation field ⓘ propagation of cosmic rays near the Sun ⓘ |
| alsoKnownAs | Local Bubble NERFINISHED ⓘ |
| boundedBy |
Local Interstellar Cloud
NERFINISHED
ⓘ
Loop I superbubble region NERFINISHED ⓘ denser interstellar clouds ⓘ |
| contains |
Local Interstellar Cloud
NERFINISHED
ⓘ
Solar neighborhood NERFINISHED ⓘ other small neutral clouds ⓘ |
| hasApproximateRadius |
~100 parsecs
ⓘ
~300 light-years ⓘ |
| hasAverageHydrogenNumberDensity | ~0.005 atoms per cubic centimeter (order of magnitude) ⓘ |
| hasOriginHypothesis |
created by multiple supernovae in a nearby OB association
ⓘ
may be related to past activity in the Scorpius–Centaurus OB association ⓘ |
| hasProperty |
hot plasma-filled interior
ⓘ
low dust density ⓘ low gas density ⓘ |
| hasScientificDiscipline |
astrophysics
ⓘ
interstellar medium studies ⓘ |
| hasShape | roughly irregular, elongated cavity ⓘ |
| hasTemperature | ~10^6 K (order of magnitude) ⓘ |
| hasUncertain |
exact number and identity of responsible supernovae
ⓘ
exact temperature and density structure ⓘ precise three-dimensional shape ⓘ |
| isLargelyClearedBy |
past supernova explosions
ⓘ
stellar winds from massive stars ⓘ |
| isPartOf | network of superbubbles in the Galactic disk ⓘ |
| locatedIn |
Milky Way
ⓘ
Orion Arm NERFINISHED ⓘ local interstellar medium ⓘ |
| mappedBy |
3D dust extinction maps
ⓘ
X-ray and EUV observations ⓘ stellar absorption-line measurements ⓘ |
| observedIn |
21-cm neutral hydrogen surveys
ⓘ
soft X-ray background emission ⓘ ultraviolet absorption lines ⓘ |
| overlapsWith | Loop I Bubble NERFINISHED ⓘ |
| relevantFor |
interpretation of heliosphere boundary conditions
ⓘ
studies of soft X-ray background ⓘ studies of star formation history near the Sun ⓘ |
| studiedIn | models of the local interstellar medium ⓘ |
| surrounds | Solar System NERFINISHED ⓘ |
| timeScaleOfFormation | tens of millions of years (order of magnitude) ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.