SH41C-4160:
Study of a sunspot umbra using spatially deconvolved Hinode spectropolarometric data
Thursday, 18 December 2014
Alberto Sainz Dalda, Stanford University, Stanford, CA, United States and Chun Ming Mark Cheung, Lockheed Martin Solar and Astrophysics Laboratory, Palo Alto, CA, United States
Abstract:
We have studied the properties of the umbra of NOAA AR 10933 using a 2-step deconvolution method to improve the quality of the data. We have implemented a simple, fast deconvolution technique for observations from the Solar Optical Telescope (SOT, Tsuneta et al 2008) on-board Hinode (Kosugi et al 2007). By performing Richardson-Lucy iterative deconvolution (Richardson 1972, Lucy 1974) on the polarization images one wavelength at a time, we remove the diffraction pattern of SOT from SP data before feeding them into a conventional inversion scheme (SIR, Ruiz Cobo & del Toro Iniesta 1992), which performs the inversion independently pixel-by-pixel. As result, we obtain well-contrasted, well-detailed physical maps of the vector magnetic field and other thermodynamic parameters that may shed light on the nature of the umbra.
