Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.229..379v&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 229, Dec. 1, 1987, p. 379-382.
Astronomy and Astrophysics
Astronomy
1
Periodic Variations, Refractivity, Spectral Correlation, Spectral Energy Distribution, Stellar Luminosity, Astronomical Spectroscopy, Optical Paths
Scientific paper
A physical length scale in the wavefront corresponding to the parameter (r0) characterizing the loss in detail in a long exposure image is identified, and the influence of the correlation scale of turbulence as r0 approaches this scale is shown. Allowing for the effect of 2-point correlations in the fluctuations of the refractive index, Venkatakrishnan and Chatterjee (1987) proposed a modified law for the phase structure function. It is suggested that the departure of the phase structure function from the 5/3 power law for length scales in the wavefront approaching the correlation scale of turbulence may lead to better 'seeing' at longer wavelengths.
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