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The quasi-periodic behavior of recurrent jets caused by emerging magnetic flux

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Abstract

A series of recurring jets occurred at the edge of an active region NOAA 11459 on 2012 April 20, and they were observed simultaneously at EUV and soft X-ray wavelengths. They also were sometimes associated with a hard X-ray source at the base region. The jets might have resulted from magnetic reconnection between the newly emerging flux and the preexisting magnetic field that corresponded to the footpoint region of large-scale coronal loops. We obtained two periods of 171 Å intensity variations at the jet footpoint region, which were about 5 and 13 min. At the jet base, the short and long periodic brightenings might have originated from magneto-acoustic waves and magnetic reconnection. It is plausible that the p-modes might possibly trigger magnetic reconnection, and that reconnection might release stored magnetic energy to produce the jets.

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Acknowledgements

We thank the Hinode, AIA, and HMI teams for data support. Hinode is a Japanese mission developed and launched by ISAS/JAXA, with NAOJ as domestic partner and NASA and STFC (UK) as international partners. It is operated by these agencies in cooperation with ESA and NSC (Norway). This work is supported by the 973 Program (2011CB811403), by the Natural Science Foundation of China under grants 11173058, 11273056, and 11333007, and by the CAS grant KJCX2-EW-T07.

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Correspondence to H. D. Li.

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Li, H.D., Jiang, Y.C., Yang, J.Y. et al. The quasi-periodic behavior of recurrent jets caused by emerging magnetic flux. Astrophys Space Sci 359, 44 (2015). https://doi.org/10.1007/s10509-015-2490-5

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  • DOI: https://doi.org/10.1007/s10509-015-2490-5

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