Long term variations of solar radius |
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| Authors: | Costantino Sigismondi and A. B. Morcos |
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| Affiliation: | (1) Sapienza, University of Rome, ICRA, P. le Aldo Moro 5, 00185 Roma, Italy;(2) Universit? de Nice-Sophia Antipolis, Observatoire de la C?te d’Azur, Laboratoire H. FIZEAU, UMR 6525-CNRS, Parc Valrose, 06108 Nice, France;(3) Johns Hopkins University Applied Physics Laboratories, 11100 Johns Hopkins Road, Laurel, MD 20723-6099, USA;(4) Archenhold-Sternwarte, Alt-Treptow 1, 12435 Berlin, Germany;(5) IOTA/ES, European Section e.V., Bartold-Knaust-Str. 8, 30459 Hannover, Germany;(6) IOTA, 7913 Kara Ct., Greenbelt, MD 20770, USA;(7) Istituto di Fisica, University of Ferrara, Via Paradiso 12, 44100 Ferrara, Italy;(8) Bergische Universitaet Wuppertal Department of Physics, Gauss Str. 20, 42119 Wuppertal, Germany;(9) Drususstr. 15, 45721 Haltern am See, Germany;(10) Towson University, 7800 York Road, Towson, MD 21252-0001, USA |
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| Abstract: | Total and annular eclipses allow us to measure the angular solar diameter at unit distance up to an accuracy of some hundredths of arcsecond. Data of lunar limb features from Japanese mission Kaguya will be useful to detect also the solar oblateness signal, relevant from a General Relativistic point of view. Useful eclipse data are available for 1567, 1715, 1869, 1925 and from 1966 to 2009 with uneven sampling: only these data can allow a study of solar diameter evolution with significant resolution on secular basis. |
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