Investigation of Umbral Dots with the New Vacuum Solar Telescope

  title={Investigation of Umbral Dots with the New Vacuum Solar Telescope},
  author={Kaifan Ji and Xia Jiang and Song Feng and Yunfei Yang and Hui Deng and Feng Wang},
  journal={Solar Physics},
Umbral dots (UDs) are small isolated brightenings observed in sunspot umbrae. They are convective phenomena existing inside umbrae. UDs are usually divided into central UDs (CUDs) and peripheral UDs (PUDs) according to their positions inside an umbra. Our purpose is to investigate UD properties and analyze their relationships, and further to find whether or not the properties depend on umbral magnetic field strengths. Thus, we selected high-resolution TiO images of four active regions (ARs… 

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