Maarten Schmidt

Maarten Schmidt
Born	(1929-12-28) December 28, 1929 Groningen
Nationality	Dutch
Fields	astronomy
Institutions	California Institute of Technology
Alma mater	Leiden Observatory
Known for	quasars
Notable awards	Kavli Prize (2008)

Maarten Schmidt (born December 28, 1929) is a Dutch astronomer who measured the distances of quasars.

Born in Groningen, The Netherlands, Schmidt studied with Jan Hendrik Oort. He earned his Ph.D. degree from Leiden Observatory in 1956.

In 1959, he emigrated to the United States and went to work at the California Institute of Technology. In the beginning, he worked on theories about the mass distribution and dynamics of galaxies. Of particular note from this period was his formulation of what has become known as the Schmidt law, which relates the density of interstellar gas to the rate of star formation occurring in that gas. He later began a study of the light spectra of radio sources. In 1963, using the famous 200-inch reflector telescope at the Palomar Observatory, Schmidt identified the visible object corresponding to one of these radio sources, known as 3C 273 and also studied its spectrum. While its star-like appearance suggested it was relatively nearby, the spectrum of 3C 273 proved to have what was at the time a high redshift of 0.158, showing that it lay far beyond the Milky Way, and thus possessed an extraordinarily high luminosity. Schmidt termed 3C 273 a "quasi-stellar" object or quasar; thousands have since been identified.

Honors

Awards

• Helen B. Warner Prize (1964)
• Front cover of Time March 11, 1966
• Henry Norris Russell Lectureship (1978)
• Gold Medal of the Royal Astronomical Society (1980)
• Correspondent of the Royal Netherlands Academy of Arts and Sciences (1980)
• James Craig Watson Medal (1991)
• Bruce Medal (1992)
• Kavli Prize for Astrophysics (2008)
• Member of the Norwegian Academy of Science and Letters.

Named after him

• Asteroid 10430 Martschmidt