radiation-bounded nebula
McGraw-Hill Science & Technology Dictionary:
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radiation-bounded nebula
(′rād·ē′ā·shən ¦bau̇n·dəd ′neb·yə·lə)
(astronomy) An emission nebula whose central star is not hot enough to ionize the entire cloud.
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radiation-bounded nebula
Wiley Book of Astronomy:
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radiation-bounded nebula
An emission nebula whose central star or stars is not hot enough to ionize the entire cloud of gas. The visible extent of the nebula is thus limited by how much ionizing radiation is available, not by the overall size of the cloud or by the amount of material it contains. Compare with a gas-bounded nebula.
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McGraw-Hill Science & Technology Dictionary
McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.
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