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Evidence for shock generation in the solar corona in the absence of coronal mass ejections

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Abstract

The solar event SOL2012–10–23T03:13, which was associated with a X1.8 flare without an accompanying coronal mass ejection (CME) and with a Type II radio burst, is analyzed. A method for constructing the spatial and temporal profiles of the difference brightness detected in the AIA/SDOUVand EUV channels is used together with the analysis of the Type II radio burst. The formation and propagation of a region of compression preceded by a collisional shock detected at distances R < 1.3R ⊙ from the center of the Sun is observed in this event (R ⊙ is the solar radius). Comparison with a similar event studied earlier, SOL2011–02–28T07:34 [1], suggests that the region of compression and shock could be due to a transient (impulsive) action exerted on the surrounding plasma by an eruptive, high-temperature magnetic rope. The initial instability and eruption of this rope could be initiated by emerging magnetic flux, and its heating from magnetic reconnection. The cessation of the eruption of the rope could result from its interaction with surrounding magnetic structures (coronal loops).

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Authors and Affiliations

  1. Institute of Solar–Terrestrial Physics, Siberian Branch of the Russian Academy of Sciences, Irkutsk, 664033, Russia

    V. G. Eselevich, M. V. Eselevich & I. N. Sharykin

  2. Institute for Space Research, Russian Academy of Sciences, Moscow, 117997, Russia

    I. V. Zimovets & I. N. Sharykin

  3. State Key Laboratory of Space Weather, National Space Science Center of Chinese Academy of Sciences, Beijing, China

    I. V. Zimovets

  4. International Space Science Institute, Beijing, China

    I. V. Zimovets

Authors
  1. V. G. Eselevich
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  2. M. V. Eselevich
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  3. I. V. Zimovets
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  4. I. N. Sharykin
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Correspondence to V. G. Eselevich.

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Original Russian Text © V.G. Eselevich, M.V. Eselevich, I.V. Zimovets, I.N. Sharykin, 2017, published in Astronomicheskii Zhurnal, 2017, Vol. 94, No. 9, pp. 793–807.

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Eselevich, V.G., Eselevich, M.V., Zimovets, I.V. et al. Evidence for shock generation in the solar corona in the absence of coronal mass ejections. Astron. Rep. 61, 805–819 (2017). https://doi.org/10.1134/S1063772917080030

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  • DOI: https://doi.org/10.1134/S1063772917080030

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