期刊
ASTRONOMY & ASTROPHYSICS
卷 489, 期 1, 页码 429-440出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361:200809959
关键词
methods : observational; techniques : image processing; techniques : polarimetric; Sun : magnetic fields; sunspots; Sun : faculae, plages
资金
- The Research Council of Norway [146467/420, 159137/V30]
Aims. We aim to achieve both high spatial resolution and high polarimetric sensitivity, using an earth-based 1m-class solar telescope, for the study of magnetic fine structure on the surface of the Sun. Methods. We use a setup with 3 high-speed, low-noise cameras to construct datasets with interleaved polarimetric states, particularly suitable for Multi-Object Multi-Frame Blind Deconvolution image restorations. We discuss the polarimetric calibration routine and various potential sources of error in the results. Results. We obtained near diffraction limited images, which have a noise level of approximate to 10(-3)I(cont). We confirm that dark cores have a weaker magnetic field and a lower inclination angle with respect to the solar surface than the edges of the penumbral filament. We demonstrate that the magnetic field strength in faculae-striations is significantly lower than in other nearby parts of the faculae.
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