Statements (32)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
stellar classification
|
| gptkbp:color |
red to infrared
|
| gptkbp:composition |
gptkb:helium
hydrogen trace metals |
| gptkbp:discoveredBy |
astronomers in late 20th century
|
| gptkbp:feature |
water vapor absorption
alkali metal lines cloudless atmospheres (T type) cool atmospheres dust clouds (L type) metal hydride absorption (L type) methane absorption (T type) molecular absorption bands no sustained hydrogen fusion transition objects between stars and planets |
| gptkbp:firstLTypeDiscovered |
GD 165B
|
| gptkbp:firstTTypeDiscovered |
gptkb:Gliese_229B
|
| https://www.w3.org/2000/01/rdf-schema#label |
L and T type dwarfs
|
| gptkbp:location |
gptkb:Milky_Way
|
| gptkbp:luminosity |
very low
|
| gptkbp:notableExample |
gptkb:Gliese_229B
2MASS J1507-1627 |
| gptkbp:observedBy |
infrared telescopes
|
| gptkbp:range |
13–80 Jupiter masses
|
| gptkbp:spectralType |
L
T |
| gptkbp:subclassOf |
white dwarf
|
| gptkbp:temperature |
1300–2500 K (L type)
600–1300 K (T type) |
| gptkbp:bfsParent |
gptkb:2MASS_survey
|
| gptkbp:bfsLayer |
7
|