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Coronal Shock Waves, EUV Waves, and Their Relation to CMEs. III. Shock-Associated CME/EUV Wave in an Event with a Two-Component EUV Transient

  • ENERGY STORAGE AND RELEASE – MODELS MEET RADIO OBSERVATIONS
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Abstract

On 17 January 2010, STEREO-B observed in extreme ultraviolet (EUV) and white light a large-scale dome-shaped expanding coronal transient with perfectly connected off-limb and on-disk signatures. Veronig et al. (Astrophys. J. Lett. 716, L57, 2010) concluded that the dome was formed by a weak shock wave. We have revealed two EUV components, one of which corresponded to this transient. All of its properties found from EUV, white light, and a metric type II burst match expectations for a freely expanding coronal shock wave, including correspondence with the fast-mode speed distribution, while the transient sweeping over the solar surface had a speed typical of EUV waves. The shock wave was presumably excited by an abrupt filament eruption. Both a weak shock approximation and a power-law fit match kinematics of the transient near the Sun. Moreover, the power-law fit matches the expansion of the CME leading edge up to 24 solar radii. The second, quasi-stationary EUV component near the dimming was presumably associated with a stretched CME structure; no indications of opening magnetic fields have been detected far from the eruption region.

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Correspondence to V. V. Grechnev.

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Energy Storage and Release through the Solar Activity Cycle – Models Meet Radio Observations

Guest Editors: Christophe Marqué and Alexander Nindos

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Grechnev, V.V., Afanasyev, A.N., Uralov, A.M. et al. Coronal Shock Waves, EUV Waves, and Their Relation to CMEs. III. Shock-Associated CME/EUV Wave in an Event with a Two-Component EUV Transient. Sol Phys 273, 461–477 (2011). https://doi.org/10.1007/s11207-011-9781-y

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  • DOI: https://doi.org/10.1007/s11207-011-9781-y

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