- Nagoya Industrial Science Research InstituteJP2 papers
- Nagoya UniversityJP2 papers
- National Astronomical Observatory of JapanJP2 papers
- RIKEN Nishina CenterJP2 papers
- Science and Technology Facilities CouncilGB2 papers
- Czech Academy of Sciences, Astronomical InstituteCZ1 paper
- Department of SpaceIN1 paper
- National Solar ObservatoryUS1 paper
- Observatoire de la Côte d’AzurFR1 paper
- University College LondonGB1 paper
- University of TsukubaJP1 paper
2 papers
astro-ph.SR2026
Analyses on Christoph Clavius' Reports of Total Solar Eclipses in 1560 and 1567: Key References for the Centennial Variations of the Earth's Rotation Speed and the Solar Radius
Hisashi Hayakawa, Mitsuru Sôma, Jean-Pierre Rozelot +4
Variations in solar radius (hereafter R_Sun) is a key reference for solar magnetic activity in time. The sunlight amount may have varied with R_Sun and had an effect on the Earth's…
astro-ph.EP2026
Variable Earth's Rotation Speed in the 14th to 16th Centuries: New ÎT Constraints from Chinese Eclipse Records
Hisashi Hayakawa, Mitsuru Sôma, Naiqi Li
Total solar eclipses are not only astronomical spectacles but also great astrophysical laboratories. Their historical records are particularly helpful for assessing the past variab…