hasNeutralHydrogenColumnDensity
P131821
predicate
Indicates that an entity is associated with a specific value of neutral hydrogen column density (the amount of neutral hydrogen per unit area along a line of sight).
Sample triples (2)
| Subject | Object |
|---|---|
|
damped Lyman-alpha systems
surface form:
damped Lyman-alpha system
|
> 2×10^20 atoms cm^-2 ⓘ |
|
damped Lyman-alpha systems
surface form:
damped Lyman-alpha system
|
> 10^20.3 atoms cm^-2 ⓘ |