Concept information
Preferred term
giant H II region
Definition(s)
- An H II region emitting at least 1050 Lyman continuum photons per second, or about 10 times Orion nebula. Such an H II region should be powered by at least one O3V star or by at least a dozen O-type and tens B-type stars. Our nearest giant H II region is NGC 3603. Some other Galactic giant H II regions are: Lagoon Nebula, M17, W31, W51A, and NGC 3576. (An Etymological Dictionary of Astronomy and Astrophysics, by M. Heydari-Malayeri, https://dictionary.obspm.fr/index.php?formSearchTextfield=giant+H+II+region&formSubmit=Search&showAll=1)
Broader concept(s)
Synonym(s)
- giant H2 region
- giant HII region
In other languages
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French
-
région H2 géante
-
région HII géante
URI
http://data.loterre.fr/ark:/67375/MDL-BF93X6XR-1
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