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.
CITATION STYLE
Grechnev, V. V., Afanasyev, A. N., Uralov, A. M., Chertok, I. M., Eselevich, M. V., Eselevich, V. G., … Kubo, Y. (2012). 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. In Energy Storage and Release through the Solar Activity Cycle: Models Meet Radio Observations (Vol. 9781461444039, pp. 155–171). Springer New York. https://doi.org/10.1007/978-1-4614-4403-9_11
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