Yusuke Hagihara (萩原 雄祐, Hagihara Yūsuke, 28 March 1897 in Osaka – 29 January 1979 in Tokyo) was a Japanese astronomer noted for his contributions to celestial mechanics.[1]
Yusuke Hagihara
Hagihara in 1954
Born
28 March 1897
Osaka, Japan
Died
29 January 1979
Tokyo, Japan
Alma mater
Tokyo Imperial University (BSc 1921) University of Tokyo (D.Sc. 1930)
Scientific career
Fields
Astronomy
Celestial mechanics
Institutions
University of Tokyo Tokyo Astronomical Observatory Japan Academy
Hagihara graduated from Tokyo Imperial University with a degree in astronomy in 1921 and became an assistant professor of astronomy there two years later.[2] In 1923 the Japanese government sent him abroad as a traveling scholar. Hagihara went to Cambridge University in England to study differential equations under the mathematician Henry Frederick Baker[2] and relativity alongside Paul Dirac under the astrophysicist Sir Arthur Stanley Eddington.[1][3] He was a visiting scholar in France, Germany, and the United States.[1]
Hagihara finished his studies at Harvard in 1929 and returned again to the University of Tokyo, where, in 1930, he completed a D.Sc. dissertation on the stability of satellite systems.[2] In 1935, he published a paper showing that the trajectory of a test particle in the Schwarzschild metric can be expressed in terms of elliptic functions.[3] For more than a decade after 1937, he investigated the distribution of electron velocities in planetary nebulae.[3]
He was promoted to full professor at the University of Tokyo in 1935.[2] From 1945 to 1957 he was the director of the Tokyo Astronomical Observatory and subsequently was a professor at Tohoku University (1957–1960) and president of Utsunomiya University (1961–1967).[3] In 1961 he was elected vice-president of the International Astronomical Union and president of the IAU's commission on celestial mechanics.[2]
He retired from all of his official duties, except for the Japan Academy, in 1967 and devoted himself to writing his comprehensive five volume work, Celestial Mechanics, which was based on his lecture notes.[2]
Hagihara was regarded as a quiet and cultured gentleman, an excellent teacher and a capable administrator.[1][2]
He has pointed out the importance of the post-Newton models for celestial mechanics, namely that developed by Georgi Manev.[citation needed]
Hagihara, Yusuke (1970). Celestial mechanics : Dynamical principles and transformation theory (vol. 1). Cambridge: MIT Press. ISBN978-0-262-08037-8.
Hagihara, Yusuke (1972). Celestial mechanics: Perturbation theory (vol. 2, parts 1 and 2). Cambridge: MIT Press.
Hagihara, Yusuke (1975). Celestial mechanics: Differential equations in celestial mechanics (vol. 3, parts 1 and 2). Tokyo: Japan Society For the Promotion of Science.
Hagihara, Yusuke (1976). Celestial mechanics: Periodic and quasi-periodic solutions (vol. 4, parts 1 and 2). Tokyo: Japan Society For the Promotion of Science.
Hagihara, Yusuke (1977). Celestial mechanics: Topology of the three-body problem (vol. 5, parts 1 and 2). Tokyo: Japan Society For the Promotion of Science.
Hagihara, Yusuke (1971). Theories of equilibrium figures of a rotating homogeneous fluid mass. Washington, D.C.: U. S. Government Printing Office. NAS 1.21:186.
^ abcdeKozai, Yoshihide (1998). "Development of Celestial Mechanics in Japan". Planet. Space Sci. 46 (8): 1031–36. Bibcode:1998P&SS...46.1031K. doi:10.1016/s0032-0633(98)00033-6.
^Schmadel, Lutz D. (2007). "(1971) Hagihara". Dictionary of Minor Planet Names – (1971) Hagihara. Springer Berlin Heidelberg. p. 159. doi:10.1007/978-3-540-29925-7_1972. ISBN978-3-540-00238-3.
Greene, Jay E., ed. (1980). McGraw-Hill Modern Scientists and Engineers. 3 vols. New York: McGraw-Hill.
February 20, 2023
yusuke, hagihara, 萩原, 雄祐, hagihara, yūsuke, march, 1897, osaka, january, 1979, tokyo, japanese, astronomer, noted, contributions, celestial, mechanics, hagihara, 1954born28, march, 1897osaka, japandied29, january, 1979tokyo, japanalma, matertokyo, imperial, un. Yusuke Hagihara 萩原 雄祐 Hagihara Yusuke 28 March 1897 in Osaka 29 January 1979 in Tokyo was a Japanese astronomer noted for his contributions to celestial mechanics 1 Yusuke HagiharaHagihara in 1954Born28 March 1897Osaka JapanDied29 January 1979Tokyo JapanAlma materTokyo Imperial University BSc 1921 University of Tokyo D Sc 1930 Scientific careerFieldsAstronomyCelestial mechanicsInstitutionsUniversity of Tokyo Tokyo Astronomical Observatory Japan AcademyNotable studentsYoshio Fujita Contents 1 Life and work 2 Honors 3 Works 4 See also 5 ReferencesLife and work EditHagihara graduated from Tokyo Imperial University with a degree in astronomy in 1921 and became an assistant professor of astronomy there two years later 2 In 1923 the Japanese government sent him abroad as a traveling scholar Hagihara went to Cambridge University in England to study differential equations under the mathematician Henry Frederick Baker 2 and relativity alongside Paul Dirac under the astrophysicist Sir Arthur Stanley Eddington 1 3 He was a visiting scholar in France Germany and the United States 1 He returned to Japan in 1925 but left for the United States three years later to study the topology of dynamical systems at Harvard University under George David Birkhoff on a Rockefeller Foundation Fellowship 3 Hagihara finished his studies at Harvard in 1929 and returned again to the University of Tokyo where in 1930 he completed a D Sc dissertation on the stability of satellite systems 2 In 1935 he published a paper showing that the trajectory of a test particle in the Schwarzschild metric can be expressed in terms of elliptic functions 3 For more than a decade after 1937 he investigated the distribution of electron velocities in planetary nebulae 3 He was promoted to full professor at the University of Tokyo in 1935 2 From 1945 to 1957 he was the director of the Tokyo Astronomical Observatory and subsequently was a professor at Tohoku University 1957 1960 and president of Utsunomiya University 1961 1967 3 In 1961 he was elected vice president of the International Astronomical Union and president of the IAU s commission on celestial mechanics 2 He retired from all of his official duties except for the Japan Academy in 1967 and devoted himself to writing his comprehensive five volume work Celestial Mechanics which was based on his lecture notes 2 Hagihara was regarded as a quiet and cultured gentleman an excellent teacher and a capable administrator 1 2 He has pointed out the importance of the post Newton models for celestial mechanics namely that developed by Georgi Manev citation needed Honors EditThe main belt asteroid 1971 Hagihara was named in his honor 4 Fellow of the Royal Astronomical Society Chairman of the National Committee of Astronomy Japan Member Japan Academy Member Science Council of Japan Order of Cultural Merit Japan Recipient of the James Craig Watson Medal from the U S National Academy of Science 1960 Works EditHagihara Yusuke 1970 Celestial mechanics Dynamical principles and transformation theory vol 1 Cambridge MIT Press ISBN 978 0 262 08037 8 Hagihara Yusuke 1972 Celestial mechanics Perturbation theory vol 2 parts 1 and 2 Cambridge MIT Press Hagihara Yusuke 1975 Celestial mechanics Differential equations in celestial mechanics vol 3 parts 1 and 2 Tokyo Japan Society For the Promotion of Science Hagihara Yusuke 1976 Celestial mechanics Periodic and quasi periodic solutions vol 4 parts 1 and 2 Tokyo Japan Society For the Promotion of Science Hagihara Yusuke 1977 Celestial mechanics Topology of the three body problem vol 5 parts 1 and 2 Tokyo Japan Society For the Promotion of Science Hagihara Yusuke 1971 Theories of equilibrium figures of a rotating homogeneous fluid mass Washington D C U S Government Printing Office NAS 1 21 186 See also Edit Biography portal Physics portalSchwarzschild geodesics List of contributors to general relativityReferences Edit a b c d Herget Paul 1979 Yusuke Hagihara Physics Today 32 6 71 Bibcode 1979PhT 32f 71H doi 10 1063 1 2995600 a b c d e f g Kozai Yoshihide 1979 Yusuke Hagihara Quart Jour Royal Astron Soc 20 3 325 8 a b c d e Kozai Yoshihide 1998 Development of Celestial Mechanics in Japan Planet Space Sci 46 8 1031 36 Bibcode 1998P amp SS 46 1031K doi 10 1016 s0032 0633 98 00033 6 Schmadel Lutz D 2007 1971 Hagihara Dictionary of Minor Planet Names 1971 Hagihara Springer Berlin Heidelberg p 159 doi 10 1007 978 3 540 29925 7 1972 ISBN 978 3 540 00238 3 Greene Jay E ed 1980 McGraw Hill Modern Scientists and Engineers 3 vols New York McGraw Hill Retrieved from https en wikipedia org w index php title Yusuke Hagihara amp oldid 1138728640, wikipedia, wiki, book, books, library,
