Strömgren, Bengt Georg Daniel (1908–1987)
Swedish astronomer who did important research in stellar structure in the
1930s but is best known for his work on ionized gas clouds – H
II regions – around hot stars. He surveyed H II regions and found
relations between the gas density, the luminosity of the star, and the size
of the Strömgren sphere of ionized hydrogen
around it. Son of the director of the Copenhagen University Observatory,
Svante Strömgren (1870–1947), he had published many research papers,
mostly in celestial mechanics, and coauthored a book by the time he received
his Ph.D. from Copenhagen at age 21. After working there and at the Yerkes
Observatory he succeeded his father at Copenhagen in 1940. He was director
of Yerkes and McDonald Observatories
from 1951 to 1957 and spent 10 years at the Institute for Advanced Study
in Princeton before returning to Copenhagen.
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