Lyman-limit systems
E1326073
UNEXPLORED
Lyman-limit systems are quasar absorption-line features characterized by high neutral hydrogen column densities that produce a sharp break at the Lyman limit in the ultraviolet spectrum, but with generally lower column densities than damped Lyman-alpha systems.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Lyman-limit systems canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T18481906 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Lyman-limit systems Context triple: [damped Lyman-alpha system, contrastedWith, Lyman-limit systems]
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A.
damped Lyman-alpha systems
Damped Lyman-alpha systems are high-column-density neutral hydrogen gas clouds observed in quasar spectra, serving as key probes of the interstellar medium and chemical evolution of galaxies in the early universe.
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B.
Lyman-δ
Lyman-δ is the fourth spectral line in the Lyman series of hydrogen, corresponding to an electron transition from the n=5 to the n=1 energy level in the ultraviolet region.
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C.
Lyman-β
Lyman-β is the second spectral line in the hydrogen Lyman series, corresponding to an electron transition from the fourth to the first energy level and emitting ultraviolet radiation.
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D.
Eddington limit
The Eddington limit is the maximum luminosity a star or accreting object can have before radiation pressure overcomes gravity and drives away its outer layers.
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E.
The Stars of High Luminosity
The Stars of High Luminosity is a seminal astrophysics monograph by Cecilia Payne-Gaposchkin that systematically analyzes and classifies very bright stars, helping to shape modern stellar astrophysics.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Lyman-limit systems Target entity description: Lyman-limit systems are quasar absorption-line features characterized by high neutral hydrogen column densities that produce a sharp break at the Lyman limit in the ultraviolet spectrum, but with generally lower column densities than damped Lyman-alpha systems.
-
A.
damped Lyman-alpha systems
Damped Lyman-alpha systems are high-column-density neutral hydrogen gas clouds observed in quasar spectra, serving as key probes of the interstellar medium and chemical evolution of galaxies in the early universe.
-
B.
Lyman-δ
Lyman-δ is the fourth spectral line in the Lyman series of hydrogen, corresponding to an electron transition from the n=5 to the n=1 energy level in the ultraviolet region.
-
C.
Lyman-β
Lyman-β is the second spectral line in the hydrogen Lyman series, corresponding to an electron transition from the fourth to the first energy level and emitting ultraviolet radiation.
-
D.
Eddington limit
The Eddington limit is the maximum luminosity a star or accreting object can have before radiation pressure overcomes gravity and drives away its outer layers.
-
E.
The Stars of High Luminosity
The Stars of High Luminosity is a seminal astrophysics monograph by Cecilia Payne-Gaposchkin that systematically analyzes and classifies very bright stars, helping to shape modern stellar astrophysics.
- F. None of above. chosen
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
damped Lyman-alpha systems