Polychromatic transfer functions in stellar speckle interferometry

Details Polychromatic transfer functions in stellar speckle interferometry Polychromatic transfer functions in stellar speckle interferometry

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989josaa...6..244b&link_type=abstract

Optical Society of America, Journal, A: Optics and Image Science (ISSN 0740-3232), vol. 6, Feb. 1989, p. 244-251.

Physics

Optics

6

Speckle Interferometry, Spectral Bands, Stellar Spectra, Transfer Functions, Bandwidth, Perturbation Theory, Wave Fronts

Scientific paper

A general expression has been derived for the dichromatic speckle cross spectrum (DCS), using as a unique assumption Korff's log-normal model for the complex wave amplitude at the telescope pupil. For a given spectral bandwidth, it is shown that the attenuation of the DCS with respect to the monochromatic spectrum is strongly seeing-dependent. A high-frequency asymptotic form is derived for the rapid numerical computation of the DCS, thus making it possible to estimate with ease the allowable spectral bandwidth for any given speckle experiment.

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