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2 results

  • Structure of sunspots observed with Hinode Solar Optical Telescope

  • Debi Prasad Choudhary, Gordon A. MacDonald, Na Deng, Shimizu Toshifumi
  • Journal:
    Proceedings of the International Astronomical Union / Volume 6 / Issue S273 / August 2010
    Published online by Cambridge University Press:
    26 August 2011, pp. 478-482
    Print publication:
    August 2010
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  • We studied 16 sunspots with different sizes and shapes using the observations with the Hinode Solar Optical Telescope. The ratio of G-band and CaII H images reveal rich structures both within the umbra and penumbra of most spots. The striking features are the compact blob at the foot point of the umbra side of the penumbral fibrils with disk center-limb side asymmetry. In this paper, we present properties of these features using the spectropolarimetry and images in G-band, CaII and blue filters. We discuss the results using the contemporary models of the sunspots.

  • Are the umbral dots, penumbral grains, and G band bright points formed by the same type of magnetic flux tubes?

  • Isroil Sattarov
  • Journal:
    Proceedings of the International Astronomical Union / Volume 6 / Issue S273 / August 2010
    Published online by Cambridge University Press:
    26 August 2011, pp. 426-429
    Print publication:
    August 2010
    • Article
      • You have access
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  • Today's Solar Physics comes across of different type of fine structures in solar atmosphere including umbral dots and penumbral grains in sunspots, and G-band bright points in quiet Sun. In this report, we present evidence that umbral dots, penumbral grains, and, possibly, G band bright points are related to a common type of features in solar atmosphere magnetic flux tubes.