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|religion = |signature = |footnotes = }} Walter Sydney Adams (December 20, 1876 – May 11, 1956) was an American astronomer.〔〔(MNRAS 117 (1957) 243 )〕〔(Obs 76 (1956) 139 )〕〔(PASP 68 (1956) 285 )〕 ==Life and work== Adams was born in Antioch, Turkey to Lucien Harper Adams and Nancy Dorrance Francis Adams, missionary parents,〔http://www.amphilsoc.org/mole/view?docId=ead/Mss.B.Ad19-ead.xml#bioghist〕 and was brought to the U.S. in 1885〔 He graduated from Dartmouth College in 1898, then continued his education in Chicago and in Germany. After returning to the U.S., he began a career in Astronomy that culminated when he became director of the Mount Wilson Observatory. His primary interest was the study of stellar spectra. He worked on solar spectroscopy and co-discovered a relationship between the relative intensities of certain spectral lines and the absolute magnitude of a star. He was able to demonstrate that spectra could be used to determine whether a star was a giant or a dwarf. In 1915 he began a study of the companion of Sirius and found that despite a size only slightly larger than the Earth, the surface of the star was brighter per unit area than the Sun and it was about as massive.〔F. Wesemael, (A comment on Adams' measurement of the gravitational redshift of Sirius B ) Royal Astronomical Society, Quarterly Journal (ISSN 0035-8738), 26, Sept. 1985, 273-278〕 Such a star later came to be known as a white dwarf. Along with Theodore Dunham, he discovered the strong presence of carbon dioxide in the infrared spectrum of Venus. Adams died at the age of 79 in Pasadena, California. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Walter Sydney Adams」の詳細全文を読む スポンサード リンク
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