Leon Mestel

Leon Mestel (born 5 August 1927) is a British astronomer and astrophysicist and Emeritus Professor at the University of Sussex. His research interests are in the areas of star formation and structure, especially stellar magnetism and astrophysical magnetohydrodynamics. He has been awarded both the Eddington Medal (1993) and the Gold Medal of the Royal Astronomical Society (for Astronomy, 2002). Following his retirement, he has also written several obituaries and biographical articles on physicists and astrophysicists.

Leon Mestel was born on 5 August 1927 in Melbourne, Australia. With his family, he emigrated to England at the age of three, where he lived in Forest Gate, east London. He was the son of Rabbi Solomon Mestel and Rachel, née Brodetsky, sister of Selig Brodetsky. He was educated at West Ham Secondary School, London, and Trinity College, Cambridge, where he obtained his BA in 1948 and his Ph.D in 1952.

He married Sylvia Louise Cole in 1951, and they have two sons and two daughters. One of his sons is Jonathan Mestel (born 1957), a mathematics professor and chess grandmaster. In 1982, as part of a memorial series of annual lectures at the University of Leeds commemorating his maternal uncle, Leon Mestel gave the 23rd Selig Brodetsky Memorial Lecture, titled Astronomy: A Mirror to Physics.

Mestel's research interests are in the area of astrophysics, including: stellar structure, stellar evolution, star formation, cosmic magnetism and pulsar electrodynamics.

At the time he was completing his Ph.D, Mestel took a position as an ICI Research Fellow at the Department of Mathematics in the University of Leeds, carrying out research here in the three-year period from 1951 to 1954. Also during this period, in 1952, he was elected a Fellow of the Royal Astronomical Society (FRAS). Mestel then spent the academic year of 1954-5 as a Commonwealth Fund Fellow at the Observatory at Princeton University.

Returning to England, he was a lecturer in mathematics at the University of Cambridge for eleven years from 1955 to 1966, first as an assistant lecturer (1955–1958) and then as a full lecturer (1958–1966). While at Cambridge, he was a Fellow of St John's College from 1957 to 1966. This time at Cambridge included a period as a visiting member of the Institute for Advanced Study in Princeton, New Jersey, during the academic year of 1961-2.

In 1963, he published a paper describing a phenomenon that occurs during galaxy and star formation that came to be known as a 'Mestel disk'.

Mestel left Cambridge in 1966 after being appointed to the position of professor at the University of Manchester, but before taking up his appointment there he spent the academic year of 1966-7 as JFK Fellow at the Weizmann Institute, Israel. Returning to England, he spent six years as professor of applied mathematics in Manchester (1967–1973). The fourth and final stage of his career was as professor of astronomy at the University of Sussex, a position he took up in 1973 and held for nineteen years.

Mestel was elected a Fellow of the Royal Society (FRS) in 1977. He retired in 1992, becoming Emeritus Professor at Sussex.

• 1993 - Eddington Medal for "his fundamental work on cosmic magnetism"
• 2002 - Gold Medal of the Royal Astronomical Society (for Astronomy, 2002).

• Citation for the award of the Eddington Medal to Professor Leon Mestel, QJRAS (1993), volume 34, pages 275-276
• Winners of the Gold Medal of the Royal Astronomical Society, Royal Astronomical Society, accessed 06/11/2010
• 2002 February meeting of the Royal Astronomical Society (announcement of the award), The Observatory, Vol. 122, p. 194-199, 2002
• 2002 April meeting of the Royal Astronomical Society (presentation of the award), The Observatory, Vol. 122, p. 242-246, 2002

Since retiring, Mestel has written several obituaries and biographical articles on physicists and astrophysicists for publications such as The Independent, the Oxford Dictionary of National Biography, and Biographical Memoirs of Fellows of the Royal Society. Those for whom Mestel has written obituaries and articles include Martin Schwarzschild, Roger John Tayler, William McCrea, Hermann Bondi, Subrahmanyan Chandrasekhar, and Thomas George Cowling. Mestel also contributed the Oxford Dictionary of National Biography entry for Selig Brodetsky.

In 2002, Mestel was an invited speaker at a conference held in Cardiff, Wales, in memory of Fred Hoyle. In 2004, together with John D. Barrow, Mestel organised a Commemoration Meeting at the Royal Astronomical Society to mark 60 years since the death of Arthur Eddington, publishing a paper on Eddington later the same year. In 2009, Mestel featured in Portraits of Astronomers, a book by Lucinda Douglas-Menzies with portraits of thirty-eight leading UK astronomers. As of 2009, Mestel resides in Cambridge.