A Gaussian spread function for the solar aureole

✍ Scribed by L. Staveland

• Book ID: 104644001
• Publisher: Springer
• Year: 1974
• Tongue: English
• Weight: 124 KB
• Volume: 36
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00151564

✦ Synopsis

An analytical expression for the limb profile and the aureole is derived for a Gaussian spread function with b/> 2'. Power series with 3 terms are used as approximation to the limb darkening given by HSRA (Gingerich et al., 1971). For smaller values of the spread parameter b the expression given by Staveland (1972) gives a more correct result. The rms difference in the intensity is ~< 0.005 between these analytical expressions and a numerical integration (Brahde, 1972) both inside and outside the limb. Mullan's (1973) expression gives too low intensities in the range 4-2b around the limb.