Álan Rex Sandej ( Eng. Allan Rex Sandage ; June 18, 1926 , Iowa City - November 13, 2010 , San Heybriel ) is an American astronomer known for his long-term research by definition of the Hubble constant .
| Allan Rex Sandage | |
|---|---|
| English Allan rex sandage | |
| Date of Birth | |
| Place of Birth | Iowa City , Iowa , USA |
| Date of death | |
| Place of death | San Gabriel , California , USA |
| A country | |
| Scientific field | astronomy |
| Place of work | Palomar Observatory |
| Alma mater | University of Illinois at Urbana-Champaign |
| supervisor | Walter Baade |
| Awards and prizes |  Gold Medal of the Royal Astronomical Society (1967)  National Science Medal of the United States (1970) |
Content
Biography
In 1948 he graduated from the University of Illinois at Urbana-Champaign . In 1953, he received a Ph.D. from Caltech .
Sandage began work at the Palomar Observatory . In 1958, he published the first more or less accurate estimate of the Hubble constant , naming the figure 75 km / s for a mega parsec , which turned out to be pretty close to the results of modern measurements. Later he became the main proponent of the idea of a smaller value, of the order of fifty, which corresponds to the age of the Universe of about 50 billion years.
He conducted a study of the spectrum of globular clusters and suggested that their age is at least 25 billion years. This gave Sandidge the idea that the Universe did not take its present size immediately, but gradually expanded over 80 billion years. Modern cosmological estimates of the age of the Universe give a value of about 13.7 billion years.
Sandwich also found plasma streams erupting from its center in the M82 galaxy . This phenomenon, in all likelihood, was caused by massive explosions in the center of the galaxy; this discovery was evidence that such explosions occurred at least one and a half billion years ago.
Rewards and recognition
- Helena Warner Prize (1957)
- Eddington Medal (1963)
- Gold Medal Pius XI (1966)
- Gold Medal of the Royal Astronomical Society (1967)
- US National Science Medal in the Physical Sciences nomination (1970)
- Henry Norris Russell Award (1972)
- Elliot Cresson Medal (1973)
- Katherine Bruce Medal (1975)
- Lecture by Karl Jansky (1991)
- Kraford Prize (1991)
- Tomall Award (1993)
- Gruber Cosmology Prize (2000)
In its part, asteroid is named.
Notes
- ↑ 1 2 SNAC - 2010.
- ↑ 1 2 Internet Speculative Fiction Database - 1995.
- ↑ http://carnegiescience.edu/news/carnegie_cosmologist_allan_sandage_dies
Literature
- Michael Rowan-Robinson. Allan Rex Sandage (Eng.) // Physics Today . - 2011. - Vol. 64, no. 6 - P. 64-65. - DOI : 10.1063 / 1.3603926 . (inaccessible link)
- Kolchinsky I.G., Korsun A.A., Rodriguez M.G. Astronomers: A Biographical Directory. - 2nd ed., Pererab. and extra .. - Kiev: Naukova Dumka, 1986. - 512 p.