Statements (18)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:astronomy
|
| gptkbp:characterizedBy |
broad emission lines
|
| gptkbp:contains |
ionized gas clouds
|
| gptkbp:distinctiveFeature |
narrow-line region
|
| gptkbp:emits |
hydrogen Balmer lines
permitted lines |
| gptkbp:firstDescribed |
1970s
|
| https://www.w3.org/2000/01/rdf-schema#label |
Broad-line region
|
| gptkbp:locatedIn |
close to supermassive black hole
|
| gptkbp:observedBy |
optical telescopes
|
| gptkbp:partOf |
active galactic nucleus
|
| gptkbp:relatedTo |
quasars
blazars Seyfert galaxies |
| gptkbp:studiedIn |
reverberation mapping
|
| gptkbp:velocityDispersion |
thousands of km/s
|
| gptkbp:bfsParent |
gptkb:Active_galactic_nuclei
|
| gptkbp:bfsLayer |
7
|