Ca ii Transient Brightenings Associated with Canceling Magnetic Features |
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| Authors: | Soyoung Park Jongchul Chae |
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| Institution: | 1. Korea Astronomy and Space Science Institute, Daejeon, 305-348, Korea
2. Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul, 151-747, Korea
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| Abstract: | We analyzed transient Ca ii H brightening associated with small-scale canceling magnetic features (CMFs) in the quiet Sun near disk center using Ca ii H filter images and Na D1 magnetograms of Hinode/SOT. We found that in most Ca ii brightening events related to CMFs the Ca ii H intensity peaks after the magnetic flux cancellation. Moreover, the brightening tends to appear as a pair of bright points of similar size and brightness overlying a magnetic bipole. Then a new opposite polarity fragment moves to them and cancels out. These results imply that magnetic reconnection takes place there and is responsible for CMFs. |
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