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    • Bose statistics and the stars

      R. Hanbury Brown

      Volume 15 Issue 1 March 1994 pp 39-45

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/015/01/0039-0045

    • Keywords

       

      Instrumentation: interferometers; stars: fundamental parameters

    • Abstract

       

      A brief account is given of the early development of a new sources. Following the chance discovery that it was unaffected by scintillation it was proposed to apply the same principle to measuring visible stars. This proposal met with vigorous opposition from physicists when it was realised that it implied that the time of arrival of photons in two mutually coherent beams of light must be correlated. Two laboratory experiments were done to demonstrate that this correlation does in fact take place. Then, after a pilot model had measured the angular size of Sirius, a full scale stellar intensity interferometer was built and installed at Narrabri in Australia. In a programme lasting 12 years it measured the angular diameters of 32 single stars in the spectral range O to F and established the first wholly empirical temperature scale for stars in that range. For the last 10 years the work has been continued by the construction of the larger and more sensitive Sydney University Stellar Interferometer called SUSI.

    • Author Affiliations

       

      R. Hanbury Brown1

      1. White Cottage, Penton Mewsey, Andover, Hants - SPII ORQ, England

    • Dates

       
      Published
      March 1994
      Manuscript received
      14 January 1994

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