Cygnus OB2 association
E477914
Cygnus OB2 association is a massive, young stellar grouping rich in hot, luminous O- and B-type stars located in the constellation Cygnus.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| DR21 star-forming region | 1 |
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
OB association
ⓘ
stellar association ⓘ young massive star cluster candidate ⓘ |
| age |
approximately 1 to 7 million years
ⓘ
young stellar population ⓘ |
| apparentSize | several degrees on the sky ⓘ |
| catalogDesignation | Cyg OB2 NERFINISHED ⓘ |
| containsStarType |
B-type star
ⓘ
O-type star ⓘ low-mass star ⓘ massive star ⓘ pre-main-sequence star ⓘ |
| discoveryMethod | photographic surveys of the Cygnus region ⓘ |
| distanceFromEarth |
approximately 1.4 kiloparsecs
ⓘ
approximately 4,600 light-years ⓘ |
| environment |
dense molecular cloud complex
ⓘ
highly obscured region of the Galactic plane ⓘ |
| galacticEnvironment | inner region of the Local spiral arm ⓘ |
| galacticLatitude | low galactic latitude ⓘ |
| hasAssociatedObject |
Cygnus OB2 #12
NERFINISHED
ⓘ
Cygnus OB2 #5 NERFINISHED ⓘ Cygnus OB2 #8A NERFINISHED ⓘ |
| hasAssociatedPhenomenon |
X-ray emission from young stars
ⓘ
intense ultraviolet radiation field ⓘ ongoing star formation in surrounding molecular clouds ⓘ photoionization of surrounding gas ⓘ strong stellar winds ⓘ |
| locatedIn |
Cygnus X star-forming complex
NERFINISHED
ⓘ
Milky Way ⓘ |
| locatedInConstellation | Cygnus NERFINISHED ⓘ |
| mass | on the order of 10^4 to 10^5 solar masses ⓘ |
| notableFeature |
embedded in heavy interstellar extinction
ⓘ
one of the most massive OB associations in the Milky Way ⓘ rich in hot, luminous stars ⓘ |
| obscuration | heavily reddened by interstellar dust ⓘ |
| observedInWavelength |
X-ray
ⓘ
infrared ⓘ optical ⓘ radio ⓘ |
| partOf | Local Arm NERFINISHED ⓘ |
| researchUse |
laboratory for massive star formation studies
ⓘ
study of feedback from massive stars ⓘ testbed for initial mass function in massive clusters ⓘ |
| stellarContent |
hundreds of O-type stars
ⓘ
tens of thousands of lower-mass stars ⓘ thousands of B-type stars ⓘ |
| visibility | visible from Northern Hemisphere ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
DR21 star-forming region