On the saturation of the refractive index structure function. II - Influence of the correlation length on astronomical 'seeing'

Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/3802

Title:	On the saturation of the refractive index structure function. II - Influence of the correlation length on astronomical 'seeing'
Authors:	Venkatakrishnan, P
Keywords:	Periodic variations Refractivity Spectral correlation Spectral energy distribution Stellar luminosity Astronomical spectroscopy Optical paths
Issue Date:	Dec-1987
Publisher:	Royal Astronomical Society
Citation:	Monthly Notices Of Royal Astronomical Society, Vol. 229, No. 3, pp. 379 - 382
Abstract:	A physical length scale in the wavefront corresponding to the parameter (r/sub0/) characterizing the loss in detail in a long exposure image is identified, and the influence of the correlation scale of turbulence as r/sub 0/ 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.
URI:	http://hdl.handle.net/2248/3802
ISSN:	0035-8711
Appears in Collections:	IIAP Publications

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