Chushiro Hayashi (林 忠四郎, Hayashi Chūshirō, July 25, 1920 – February 28, 2010) was a Japanese astrophysicist. Hayashi tracks on the Hertzsprung–Russell diagram are named after him.
Chūshirō Hayashi | |
|---|---|
 | |
| Born | July 25, 1920 Kyoto, Japan |
| Died | February 28, 2010 (aged 89) Kyoto, Japan |
| Nationality | Japanese |
| Alma mater | University of Tokyo |
| Awards | Eddington Medal in 1970 Kyoto Prize in 1995 Bruce Medal in 2004 |
| Scientific career | |
| Fields | astrophysics |
| Institutions | Kyoto University |
| Doctoral advisor | Hideki Yukawa |
| Doctoral students | Katsuhiko Sato |
Hayashi was born in Kyoto and enrolled at the Imperial University of Tokyo in 1940, earning his BSc in Physics after 2½ years, in 1942. He was conscripted into the navy[1] and, after the war ended, joined the group of Hideki Yukawa at Kyoto University. He was appointed a professor at Kyoto University in 1957.[1]
He made additions to the Big Bang nucleosynthesis model that built upon the work of the classic Alpher–Bethe–Gamow paper.[2] Probably his most famous work was the astrophysical calculations that led to the Hayashi tracks of star formation,[3] and the Hayashi limit that puts a limit on star radius. He was also involved in the early study of brown dwarfs, some of the smallest stars formed.[4]
He retired in 1984 and died from pneumonia at a Kyoto hospital on February 28, 2010.[5][6]
Awards and honours
edit- 1965 Asahi Prize
- 1970 Eddington Medal
- 1971 Imperial Prize of the Japan Academy[7]
- 1994 Order of the Sacred Treasure, First Class[1]
- 1995 Kyoto Prize
- 2004 Bruce Medal
- Asteroid 12141 Chushayashi is named after him.
References
edit- ^ a b c Nakagawa, Y. (2011), "Obituary: Chushiro Hayashi (1920-2010)", Bulletin of the American Astronomical Society, 43: 014, Bibcode:2011BAAS...43..014N, doi:10.3847/BAASOBIT2011014
- ^ Hayashi, Chushiro (1961). "Proton-neutron concentration ratio in the expanding Universe at the stages preceding the formation of the elements". Progress of Theoretical Physics. 5 (2): 224–235. doi:10.1143/PTP.5.224.
- ^ Hayashi, Chushiro (1961). "Stellar evolution in early phases of gravitational contraction". Publications of the Astronomical Society of Japan. 13: 450–452. Bibcode:1961PASJ...13..450H.
- ^ Hayashi, Chushiro; Nakano, T. (1963). "Evolution of Stars of Small Masses in the Pre-Main-Sequence Stages". Progress of Theoretical Physics. 30 (4): 460–474. Bibcode:1963PThPh..30..460H. doi:10.1143/PTP.30.460.
- ^ Sugimoto, Daiichiro (2010). "Chushiro Hayashi 1920–2010". Astronomy & Geophysics. 51 (3): 3.36. Bibcode:2010A&G....51c..36S. doi:10.1111/j.1468-4004.2010.51336.x.
- ^ "Award-winning Japanese astrophysicist Hayashi dies at 89". Kyodo News. March 1, 2010. Retrieved March 1, 2010.[permanent dead link]
- ^ Japan Academy, 61st-70th; retrieved 2011-08-15