W4 star-forming region
E110488
W4 star-forming region is a massive stellar nursery in the Milky Way known for its large cavity carved by young, high-mass stars and associated H II region.
All labels observed (2)
| Label | Occurrences |
|---|---|
| W4 H II region | 2 |
| W4 star-forming region canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T934094 — 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: W4 star-forming region Context triple: [Perseus Arm, contains, W4 star-forming region]
-
A.
W3 star-forming region
W3 star-forming region is a massive, active stellar nursery in the Milky Way known for its dense molecular clouds and prolific formation of young, high-mass stars.
-
B.
Cygnus X star-forming region
The Cygnus X star-forming region is a massive, nearby complex of gas, dust, and young stars that is one of the most active stellar nurseries in the Milky Way.
-
C.
NGC 7538
NGC 7538 is a massive star-forming nebula in the constellation Cepheus, notable for hosting some of the largest known protostars in the Milky Way.
-
D.
Eagle Nebula
The Eagle Nebula is a famous star-forming region in the Milky Way best known for the "Pillars of Creation," towering columns of gas and dust captured in iconic Hubble Space Telescope images.
-
E.
Perseus molecular cloud complex
The Perseus molecular cloud complex is a prominent nearby star-forming region rich in cold gas and dust, known for hosting numerous young stellar objects and protostars.
- 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: W4 star-forming region Target entity description: W4 star-forming region is a massive stellar nursery in the Milky Way known for its large cavity carved by young, high-mass stars and associated H II region.
-
A.
W3 star-forming region
W3 star-forming region is a massive, active stellar nursery in the Milky Way known for its dense molecular clouds and prolific formation of young, high-mass stars.
-
B.
Cygnus X star-forming region
The Cygnus X star-forming region is a massive, nearby complex of gas, dust, and young stars that is one of the most active stellar nurseries in the Milky Way.
-
C.
NGC 7538
NGC 7538 is a massive star-forming nebula in the constellation Cepheus, notable for hosting some of the largest known protostars in the Milky Way.
-
D.
Eagle Nebula
The Eagle Nebula is a famous star-forming region in the Milky Way best known for the "Pillars of Creation," towering columns of gas and dust captured in iconic Hubble Space Telescope images.
-
E.
Perseus molecular cloud complex
The Perseus molecular cloud complex is a prominent nearby star-forming region rich in cold gas and dust, known for hosting numerous young stellar objects and protostars.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
H II region
ⓘ
star-forming region ⓘ stellar nursery ⓘ |
| associatedWith |
Heart Nebula
ⓘ
IC 1805 ⓘ |
| catalogDesignation |
Sharpless 2-190 (for associated nebula)
ⓘ
W4 ⓘ |
| contains |
ionized hydrogen gas
ⓘ
massive OB stars ⓘ open cluster IC 1805 ⓘ young high-mass stars ⓘ |
| distanceFromEarth |
approximately 1.8 kiloparsecs
ⓘ
approximately 6000 light-years ⓘ |
| drivenBy |
ionizing radiation from young stars
ⓘ
winds from massive O-type stars ⓘ |
| hasAge | a few million years (order of magnitude) ⓘ |
| hasAlternativeName |
IC 1805 (Heart Nebula)
ⓘ
surface form:
IC 1805 H II region
W4 star-forming region ⓘ
surface form:
W4 H II region
|
| hasEffectOn |
shaping molecular clouds
ⓘ
surrounding interstellar medium ⓘ |
| hasFeature |
expanding ionized gas shell
ⓘ
large cavity carved by stellar winds ⓘ superbubble structure ⓘ |
| hasPhysicalProcess |
massive star formation
ⓘ
photoionization ⓘ stellar wind feedback ⓘ triggered star formation ⓘ |
| hasRoleIn |
studies of feedback from massive stars
ⓘ
studies of superbubble evolution ⓘ studies of triggered star formation ⓘ |
| hasShape | cavity or bubble-like structure ⓘ |
| hasStarFormation |
ongoing
ⓘ
recent ⓘ |
| isTypeOf |
giant H II region
ⓘ
massive star-forming complex ⓘ |
| locatedIn |
Milky Way
ⓘ
Perseus Spiral Arm ⓘ
surface form:
Perseus arm of the Milky Way
|
| locatedInConstellation | Cassiopeia ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| partOf | W3/W4/W5 complex ⓘ |
| poweredBy |
open cluster IC 1805
ⓘ
surface form:
cluster IC 1805
|
| surroundedBy |
molecular clouds
ⓘ
neutral atomic gas ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: W4 star-forming region Description of subject: W4 star-forming region is a massive stellar nursery in the Milky Way known for its large cavity carved by young, high-mass stars and associated H II region.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
W4 H II region
this entity surface form:
W4 H II region