Solar limb darkening function and solar diameter with eclipses observations

Autor:	Raponi, Andrea, Sigismondi, Costantino, Guhl, Konrad, Nugent, Richard, Tegtmeier, Andreas
Rok vydání:	2012
Předmět:	Astrophysics - Solar and Stellar Astrophysics Astrophysics - Instrumentation and Methods for Astrophysics
Druh dokumentu:	Working Paper
DOI:	10.1051/eas/1255056
Popis:	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. Comment: 3 pages, 2 figures. Proceedings of the Fourth French-Chinese meeting on Solar Physics Understanding Solar Activity: Advances and Challenges, 15 - 18 November, 2011 Nice, France
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1201.0685 Zobrazit plný text záznamu View this record from Arxiv