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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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File | Description | Size | Format | |
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On the saturation of the refractive index structure function | 300.65 kB | Adobe PDF | View/Open |
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