Small-Scale Jetlike Features in Penumbral Chromospheres
Yukio KatsukawaHigh Altitude Observatory, National Center for Atmospheric Research, Post Office Box 3000, Boulder, CO 80307, USAThomas BergerHigh Altitude Observatory, National Center for Atmospheric Research, Post Office Box 3000, Boulder, CO 80307, USAKiyoshi IchimotoHigh Altitude Observatory, National Center for Atmospheric Research, Post Office Box 3000, Boulder, CO 80307, USAB. W. LitesHigh Altitude Observatory, National Center for Atmospheric Research, Post Office Box 3000, Boulder, CO 80307, USAS. NagataHigh Altitude Observatory, National Center for Atmospheric Research, Post Office Box 3000, Boulder, CO 80307, USAToshifumi ShimizuHigh Altitude Observatory, National Center for Atmospheric Research, Post Office Box 3000, Boulder, CO 80307, USAR. A. ShineHigh Altitude Observatory, National Center for Atmospheric Research, Post Office Box 3000, Boulder, CO 80307, USAY. SuematsuHigh Altitude Observatory, National Center for Atmospheric Research, Post Office Box 3000, Boulder, CO 80307, USAT. D. TarbellHigh Altitude Observatory, National Center for Atmospheric Research, Post Office Box 3000, Boulder, CO 80307, USAA. M. TitleHigh Altitude Observatory, National Center for Atmospheric Research, Post Office Box 3000, Boulder, CO 80307, USAS. TsunetaHigh Altitude Observatory, National Center for Atmospheric Research, Post Office Box 3000, Boulder, CO 80307, USA
2007en
ABI
Аннотация
We observed fine-scale jetlike features, referred to as penumbral microjets, in chromospheres of sunspot penumbrae. The microjets were identified in image sequences of a sunspot taken through a Ca II H-line filter on the Solar Optical Telescope on board the Japanese solar physics satellite Hinode. The microjets' small width of 400 kilometers and short duration of less than 1 minute make them difficult to identify in existing observations. The microjets are possibly caused by magnetic reconnection in the complex magnetic configuration in penumbrae and have the potential to heat the corona above a sunspot.
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