Henry Emil Kandrup
Born	(1955-07-24)July 24, 1955 Manhasset,New York
Died	October 18, 2003(2003-10-18) (aged 48) Gainesville, Florida, USA
Citizenship	United States
Alma mater	University of Chicago
Scientific career
Fields	Astrophysics,Plasma Physics
Institutions	University of Florida, Gainesville (1990-2003)
Doctoral advisor	James Ipser

Henry Emil Kandrup (July 24, 1955 – October 18, 2003) was an Americanastrophysicist and professor at theUniversity of Florida, Gainesville. His major contributions were in the areas ofgalaxy dynamics andplasma physics.^[1]

Kandrup was born inManhasset, New York and spent most of his childhood inGreat Neck. His parents, Jytte and Fred, were immigrants fromDenmark where his father had worked as a silver smith. He graduated from theBrooks Preparatory School inAndover, Massachusetts at the age of 16, then enrolled atCornell, transferring toPrinceton the following year. He received his PhD in 1980 from theUniversity of Chicago where his thesis advisor wasJames Ipser. He taught atOakland University andSyracuse University before coming to the University of Florida in 1990.

Already as a child, Kandrup was an accomplished musician, playing the organ, piano and French horn. He was also a passionate devotee of opera and ballet.

Kandrup's work led to greater understanding in the fields ofstellar dynamics,chaos, andplasma physics. Much of Kandrup's research was directed toward developing a more refined mathematical description of dynamicalrelaxation in stellar systems. In a series of papers from the early 1990s, Henry developed the idea of chaotic phase mixing, the process by which an ensemble of points evolves toward a uniform coarse-grained population of phase space.^[2][3]

Among his other contributions were a demonstration of the equivalence ofLandau damping and phase mixing; a proof (with J. F. Sygnet) of the linear stability of a broad class of stellar systems;^[4] and a generalization ofJeans's theorem to non-integrable systems.^[5] At the time of his death, he was investigating the chaotic dynamics ofcharged particle beams, and the influence of binarysupermassive black holes on the motion of stars in galaxies.^[6]

Kandrup organized more than a dozen workshops onnonlinear dynamics at the University of Florida.^[7]

• Asteroid12008 Kandrup

• Smith, Haywood C."Henry Emil Kandrup". University of Florida. Remembrance of Kandrup by a colleague.
• Merritt, D. (2005). "Henry Kandrup's Ideas About Relaxation of Stellar Systems".Annals of the New York Academy of Sciences.1045:3–11.arXiv:astro-ph/0502169.Bibcode:2005NYASA1045....3M.doi:10.1196/annals.1350.002.PMID 15980300.S2CID 12932875.
• Gottesman, Stephen T.; Buchler, J.-R.; Mahon, M. E., eds. (2005).Nonlinear Dynamics in Astronomy and Physics: In Memory of Henry Kandrup. Annals of the New York Academy of Sciences. Wiley Blackwell.ISBN 978-1573315913. Proceedings of the 16th Florida Workshop in Nonlinear Astronomy and Physics.

• 1955 births
• 2003 deaths
• Cornell University alumni
• Princeton University alumni
• University of Chicago alumni
• Oakland University faculty
• Syracuse University faculty
• University of Florida faculty
• American astronomers
• People from Manhasset, New York
• Scientists from New York (state)

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