Hewish , Antony

Hewish , Antony
(1924–) British radio astronomer
Hewish was born at Fowey in Cornwall, and studied at Cambridge University. He obtained his BA in 1948 and his PhD in 1952 after wartime work with the Royal Aircraft Establishment, Farnborough. He lectured in physics at Cambridge until in 1969 he was made reader and in 1971 professor of radio astronomy, becoming professor emeritus in 1989. In 1974 he was awarded the Nobel Prize for physics jointly with Martin Ryle.
One of Hewish's research projects was the study of radio scintillation using the 4.5-acre telescope, which consisted of a regular array of 2048 dipoles operating at a wavelength of 3.7 meters. Radio scintillation is a phenomenon, similar to the twinkling of visible stars, arising from random deflections of radio waves by ionized gas. The three types of scintillation are caused by ionized gas in the interstellar medium, in the interplanetary medium, and in the Earth's atmosphere. All three types were discovered at Cambridge and Hewish was involved in their investigation. In 1967 a research student, Jocelyn Bell (later Bell Burnell), noticed a rapidly fluctuating but unusually regular radio signal that turned out to have a periodicity of 1.337,301,13 seconds. She had discovered the first pulsar.
To determine the nature of the signal, Hewish's first job was to eliminate such man-made sources as satellites, radar echoes, and the like. Measurements indicated that it must be well beyond the solar system. It seemed possible that it had been transmitted by an alien intelligence and the LGM (Little Green Men) hypothesis, as it became known, was seriously considered at Cambridge, but with the rapid discovery of three more pulsars it was soon dropped.
Hewish did however manage to establish some of the main properties of the pulsar from a careful analysis of its radio signal. Apart from its striking regularity (it was later shown to be slowing down very slightly) it was extremely small, no more than a few thousand kilometers, and was situated in our Galaxy.
By the end of February 1968 Hewish was ready to publish. His account received wide publicity in the popular press and stimulated much thought among astronomers as to the possible mechanism. The proposal made by Thomas Gold and others that pulsars were rapidly rotating neutron stars has since won acceptance.

Scientists. . 2011.

Look at other dictionaries:

  • Hewish, Antony — born May 11, 1924, Fowey, Cornwall, Eng. British astrophysicist. In 1967 Hewish determined that the regularly patterned radio signals (pulses) that Jocelyn Bell Burnell had detected were not caused by earthly interference or, as some speculated,… …   Universalium

  • Hewish, Antony — (n. 11 may. 1924, Fowey, Cornwall, Inglaterra). Astrofísico británico. En 1967, Hewish determinó que las señales de radio regulares (pulsos) que Jocelyn Bell Burnell había detectado, no eran causadas por interferencias terrestres o, como algunos… …   Enciclopedia Universal

  • Hewish,Antony — Hew·ish (hyo͞oʹĭsh), Antony. Born 1924. British astronomer. He shared a 1974 Nobel Prize in physics for his discovery of pulsars. * * * …   Universalium

  • Hewish, Antony and Martin Ryle —    Hewish b. 1924; Ryle b. 1918, Brighton; d. 1984, Cambridge    Astronomers    In 1959, Cambridge University appointed Martin Ryle to a new Chair of Radio Astronomy; in 1972 he was appointed Astronomer Royal. He and Antony Hewish worked under… …   Encyclopedia of contemporary British culture

  • Hewish — Antony …   Scientists

  • Hewish — Antony Hewish (* 11. Mai 1924 in Fowey, Cornwall) ist ein britischer Radioastronom. Inhaltsverzeichnis 1 Leben 2 Werk 3 Auszeichnungen 4 Weblinks // …   Deutsch Wikipedia

  • Antony — /an teuh nee/, n. 1. Mark (Marcus Antonius), 83? 30 B.C., Roman general: friend of Caesar; member of the second triumvirate and rival of Octavian. 2. a male given name. * * * (as used in expressions) Antony Mark Hewish Antony Tudor Antony * * * …   Universalium

  • Antony Hewish — Saltar a navegación, búsqueda Antony Hewish nació en Fowey, Cornualles, el 11 de mayo de 1924. Este radioastrónomo británico ganó el Premio Nobel de Física en 1974 (junto con el radioastrónomo Martin Ryle) por su trabajo en el desarrollo de la… …   Wikipedia Español

  • Antony Hewish — (11 mai 1924 à Fowey, Cornouailles) est un astronome britannique. Lui et Martin Ryle sont colauréats du prix Nobel de physique de 1974 « pour leurs recherches pionnières en radio astrophysique : Ryle pour ses observations et ses… …   Wikipédia en Français

  • Antony Hewish — (* 11. Mai 1924 in Fowey, Cornwall) ist ein britischer Radioastronom und Physik Nobelreisträger. Inhaltsverzeichnis 1 Leben 2 Werk 3 Auszeichnungen …   Deutsch Wikipedia

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