| Issue |
EAS Publications Series
Volume 55, 2012
4th French-Chinese Meeting on Solar Physics - Understanding Solar Activity: Advances and Challenges
|
|
|---|---|---|
| Page(s) | 389 - 391 | |
| Section | Instrumentation | |
| DOI | https://doi.org/10.1051/eas/1255056 | |
| Published online | 27 June 2012 | |
M. Faurobert, C. Fang and T. Corbard (eds)
EAS Publications Series, 55 (2012) 389-391
Solar limb darkening function and solar diameter with eclipse observations
1
Sapienza University of Rome,
Italy
e-mail: andr.raponi@gmail.com
2
Sapienza University of Rome and ICRA,
Italy ; University of Nice-Sophia
Antipolis, France ; IRSOL and
GPA-Observatorio Nacional Rio de Janeiro,
Brazil
3
IOTA, International Occultation Timing Association
We introduce a new method to perform high resolution astrometry of the solar diameter from the ground, through the observations of eclipses. A discussion of the solar diameter and its variations is linked to the Limb Darkening Function (LDF) using the luminosity evolution of a Baily’s Bead and the profile of the lunar limb available from satellite data. The inflexion point of the LDF is defined as the solar limb. The method proposed is applied for the videos of the eclipse in January, 15, 2010 recorded by Richard Nugent in Uganda and Andreas Tegtmeier in India. An upper limit for the inflexion point position has been set for that eclipse.
© EAS, EDP Sciences 2012