• Measuring the sizes of stars

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      https://www.ias.ac.in/article/fulltext/joaa/005/01/0019-0030

    • Keywords

       

      stars, angular diameter; interferometry; atmospheric scintillation

    • Abstract

       

      The Chatterton Astronomy Department aims to apply interferometers with very high resolving power to optical astronomy. The programme of the stellar intensity interferometer at Narrabri Observatory was completed in 1972 and since then the work has been directed towards building a more sensitive instrument with higher resolving power. As a first step a much larger intensity interferometer was designed but was not built because it was large, expensive and not as sensitive as desired. Efforts are now being made to design a more sensitive and cheaper instrument. A version of Michelson’s stellar interferometer is being built using modern techniques. It is hoped that it will reach stars of magnitude +8 and will work reliably in the presence of atmospheric scintillation. It is expected to cost considerably less than an intensity interferometer of comparable performance. The pilot model of this new instrument is almost complete and should be ready for test in 1984.

    • Author Affiliations

       

      R. Hanbury Brown1

      1. Chatterton Astronomy Department, School of Physics, University of Sydney, N.S. W. - 2006, Australia
    • Dates

       
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