Statements (22)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
galaxy type
|
| gptkbp:centralEngine |
black hole
|
| gptkbp:characterizedBy |
broad emission lines
strong ultraviolet emission variable brightness |
| gptkbp:contrastsWith |
Seyfert 2 galaxy
|
| gptkbp:discoveredBy |
gptkb:Carl_Seyfert
|
| gptkbp:example |
gptkb:NGC_4151
gptkb:NGC_5548 Markarian 335 |
| gptkbp:firstDescribed |
1943
|
| gptkbp:foundIn |
spiral galaxies
|
| https://www.w3.org/2000/01/rdf-schema#label |
Seyfert 1 galaxy
|
| gptkbp:observedBy |
optical wavelengths
X-ray wavelengths radio wavelengths |
| gptkbp:redshift |
typically < 0.1
|
| gptkbp:shows |
broad permitted lines
narrow forbidden lines |
| gptkbp:subclassOf |
active galactic nucleus
|
| gptkbp:bfsParent |
gptkb:1H_1934+098
|
| gptkbp:bfsLayer |
8
|