The association of a J -burst with a solar jet
Item Type:Journal Article
Citation:Morosan, D.E. and Gallagher, P.T. and Fallows, R.A. and Reid, H. and Mann, G. and Bisi, M.M. and Magdaleni??, J. and Rucker, H.O. and Thid??, B. and Vocks, C. and Anderson, J. and Asgekar, A. and Avruch, I.M. and Bell, M.E. and Bentum, M.J. and Best, P. and Blaauw, R. and Bonafede, A. and Breitling, F. and Broderick, J.W. and Br??ggen, M. and Cerrigone, L. and Ciardi, B. and De Geus, E. and Duscha, S. and Eisl??ffel, J. and Falcke, H. and Garrett, M.A. and Grie??meier, J.M. and Gunst, A.W. and Hoeft, M. and Iacobelli, M. and Juette, E. and Kuper, G. and McFadden, R. and McKay-Bukowski, D. and McKean, J.P. and Mulcahy, D.D. and Munk, H. and Nelles, A. and Orru, E. and Paas, H. and Pandey-Pommier, M. and Pandey, V.N. and Pizzo, R. and Polatidis, A.G. and Reich, W. and Schwarz, D.J. and Sluman, J. and Smirnov, O. and Steinmetz, M. and Tagger, M. and Ter Veen, S. and Thoudam, S. and Toribio, M.C. and Vermeulen, R. and Van Weeren, R.J. and Wucknitz, O. and Zarka, P., The association of a J -burst with a solar jet, Astronomy and Astrophysics, 606, 2017, A81-
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Context. The Sun is an active star that produces large-scale energetic events such as solar flares and coronal mass ejections, and numerous smaller scale events such as solar jets. These events are often associated with accelerated particles that can cause emission at radio wavelengths. The reconfiguration of the solar magnetic field in the corona is believed to be the cause of the majority of solar energetic events and accelerated particles. Aims. Here, we investigate a bright J-burst that was associated with a solar jet and the possible emission mechanism causing these two phenomena. Methods. We used data from the Solar Dynamics Observatory (SDO) to observe a solar jet and radio data from the Low Frequency Array (LOFAR) and the Nançay Radioheliograph (NRH) to observe a J-burst over a broad frequency range (33–173 MHz) on 9 July 2013 at ~11:06 UT. Results. The J-burst showed fundamental and harmonic components and was associated with a solar jet observed at extreme ultraviolet wavelengths with SDO. The solar jet occurred in the northern hemisphere at a time and location coincident with the radio burst and not inside a group of complex active regions in the southern hemisphere. The jet occurred in the negative polarity region of an area of bipolar plage. Newly emerged positive flux in this region appeared to be the trigger of the jet. Conclusions. Magnetic reconnection between the overlying coronal field lines and the newly emerged positive field lines is most likely the cause of the solar jet. Radio imaging provides a clear association between the jet and the J-burst, which shows the path of the accelerated electrons. These electrons travelled from a region in the vicinity of the solar jet along closed magnetic field lines up to the top of a closed magnetic loop at a height of ~360 Mm. Such small-scale complex eruptive events arising from magnetic reconnection could facilitate accelerated electrons to produce continuously the large numbers of Type III bursts observed at low frequencies, in a similar way to the J-burst analysed here.
Author: GALLAGHER, PETER; Morosan, D.E.; Fallows, R.A.; Reid, H.; Mann, G.; Bisi, M.M.; Magdalenić, J; Rucker, H.O.; Thidé, B.; Vocks, C.; Anderson, J.; Asgekar, A.; Avruch, I.M.; Bell, M.E.; Bentum, M.J.; Best, P.; Blaauw, R.; Bonafede, A.; Breitling, F.; Broderick, J.W.; Brüggen, M.; Cerrigone, L.; Ciardi, B.; de Geus, E.; Duscha, S.; Eislöffel, J.; Falcke, H.; Garett, M.A.; Grießmeier, J.M.; Gunst, A.W.; Hoeft, M.; Iacobelli, M.; Juette, E.; Kuper, G.; McFadden, R.; McKay-Bukowski, D.; McKean, J.P.; Mulcahy, D.D.; Munk, H.; Nelles, A.; Orru, E.; Paas, H.; Pandey-Pommier, M.; Pandey, V.N.; Pizzo, R.; Polatidis, A.G.; Reich, W.; Schwarz, D.J.; Sluman, J.; Smirnov, O.; Steinmetz, M.; Tagger, M.; ter Veen, S.; Thoudam, S.; Toribio, M.C.; Vermeulen, R.; van Weeren, R.J.; Wucknitz, O.; Zarka, P.
Type of material:Journal Article
Series/Report no:Astronomy and Astrophysics;
Availability:Full text available