Presentation on theme: "The solar limb during eclipses: Flash Spectrum Region and Baily beads Costantino Sigismondi ICRA-Sapienza, Roma; Université de Nice-Sophia Antipolis and."— Presentation transcript:
The solar limb during eclipses: Flash Spectrum Region and Baily beads Costantino Sigismondi ICRA-Sapienza, Roma; Université de Nice-Sophia Antipolis and IRSOL Istituto Ricerche Solari di Locarno firstname.lastname@example.org post-éclipse meeting, IAP 30.9.2010
Participating institutions ICRA, International Center for Relativistic Astrophysics Sapienza University of Rome # IOTA ES and US * # Osservatorio Astronomico di Roma # Basilica di Santa Maria degli Angeli, Roma * Yale Astronomy Department # Université de Nice-Fizeau Dept. # Observatoire de la Cote d'Azur (Calern site PICARD Sol) * Institute d'Astrophysique de Paris * # IRSOL * # # data and analysis * observations (CLAVIUS)
Measuring radius from Earth Drift-scan: solar angular speed * transit time = diameter problem: seeing Angular direct measurements – problem: seeing, optical aberration Mercury and Venus transits: planetary speed * transit time = diameter - problem: scintillation, black drop Eclipses with Bailys beads – problem: scintillation, signal to noise, filter, FSR
….and in eclipses: In 1581 edition Clavius wrote: relinquebatur in Sole circulus quidam exilis undique totam lunam ambiens. He actually saw an annular eclipse. The Sun in 1567 was >2.5 arcsec larger than now ? Not possible for physical reasons…
Your consent to our cookies if you continue to use this website.