Harold Irving Ewen

Harold Irving Ewen
Harold Irving Ewen
Born	March 5, 1922; Chicopee, Massachusetts
Died	October 8, 2015 (aged 93)
Education	Ph.D. (1951)
Alma mater	Harvard University
Known for	Detection of 21-cm hydrogen line
Spouse	Mary Ann Whitney
Children	Donald, Bruce, Mark, Deborah, David, Daniel, and Rebecca
Parents	S. Arthur Ewen (father); Ruth F. Fay (mother);
Awards	IEEE Morris E. Leeds Award (1970); Beatrice M. Tinsley Prize (1988)
	Scientific career
Thesis	Radiation from Galactic Hydrogen at 1420 Megacycles per Second (1951)
Doctoral advisor	Edward M. Purcell

Harold Irving "Doc" Ewen (March 5, 1922 – October 8, 2015) was an American physicist, radio astronomer, and business executive. He served in the United States Navy in World War II as a second lieutenant. As a graduate student under Edward M. Purcell, he was the first to detect the galactic 21-cm hydrogen line.

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