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Estimating the Eclipse Solar Radius from Flash Spectrum Videos
JOA 2022, Vol. 12, No. 2, Page 3 Author(s): Luca Quaglia, John Irwin, Konstantinos Emmanouilidis, Alessandro PessiAbstract: The eclipse solar radius can be estimated by extracting Baily’s beads light curves from flash spectrum videos recorded at the edge of the eclipse umbral shadow path and by fitting synthetic light curves onto them. The simulations are performed by integrating the limb darkening function over the exposed area of the photosphere. We have applied this methodology to the 2017 August 21 total solar eclipse and obtained an estimate Sꙩ = (959.95 ± 0.05)” for the value of the eclipse solar radius at 1 au, with negligible wavelength dependency.