The shape of a scatter-broadened image - II. Interferometric visibilities

Jeremy J. Goodman, Ramesh Narayan

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

We consider the angular broadening of a point source due to the effect of strong scattering and analytically estimate the rms image visibilities that would be measured by a two-element interferometer. The analysis, which is based on thin-screen scalar diffraction theory, confirms our earlier result that the measured visibilities depend both on the integration time of the observations and on the bandwidth employed. Three regimes of these parameters are identified. For the intermediate regime, corresponding to so-called 'average' visibilities, we obtain formulae which relate the rms visibility

Original languageEnglish (US)
Pages (from-to)995-1028
Number of pages34
JournalMonthly Notices of the Royal Astronomical Society
Volume238
Issue number3
DOIs
StatePublished - Jan 1 1989

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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