Malvin Avram Ruderman (born 1927 in New York City) is an American
physicist and astrophysicist.
Mal Ruderman received his A.B. degree from
Columbia University in
1945. His M.S. degree (1947) and Ph.D. (1951) are from the California
Institute of Technology under the supervision of Robert Jay
In 1951–53, Ruderman worked at Berkeley's Radiation Laboratory. He
became an assistant professor at UC Berkeley in 1953, rising by 1964
to the rank of full professor. He moved to
New York University
New York University in
1964, and to
Columbia University in 1969, becoming Centennial
Professor in 1980. Ruderman served as chair of the Department of
Physics at Columbia in 1973–75.
Charles Kittel in 1954, Ruderman discovered the RKKY interaction
for nuclear magnetic moments in certain metals (independently
developed by Kasuya and Yosida, hence its name). His later research
interests in astrophysics include collapsed objects in astrophysics,
neutron stars, and gamma ray emission.
In the early 1960s, Ruderman was a member of the committee that
conceived the Berkeley Physics Course. He developed the first draft of
the first volume, Mechanics, for use at Berkeley in 1963. With Charles
Kittel and Walter D. Knight, he was co-author of the final published
In 1969, Ruderman and (independently) Gordon Baym, Christopher
Pethick, and David Pines, were the first to propose that discontinuous
slowings observed in neutron stars, so called starquakes, were due to
the cracking of the star's solid crust, under increasing stress due to
the gradual slowdown of the pulsar.
Ruderman was awarded a
Guggenheim Fellowship in 1956. He was elected
National Academy of Sciences
National Academy of Sciences in 1972. He is a recipient of the
Pregel Medal of the New York Academy of Sciences.
^ a b c American Institute of Physics, Physics History Network,
"Malvin A. Ruderman"
^ Mathematics Genealogy Project, "Malvin Ruderman"
^ Charles Kittel, Walter D. Knight, and Malvin Ruderman, Mechanics:
Berkeley Course in Physics, Volume 1, McGraw-Hill (1965), Preface, p.
^ Malcolm S. Longair, The Cosmic Century: A History of Astrophysics
and Cosmology, Cambridge University Press (2006), p. 196.
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