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American Astronomical Society, Astrophysical Journal, 2(681), p. L113-L116, 2008

DOI: 10.1086/590493

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High-Cadence Observations of a Global Coronal Wave by STEREO EUVI

Journal article published in 2008 by Astrid M. Veronig, Manuela Temmer ORCID, Bojan Vršnak
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Preprint: archiving forbidden
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Postprint: archiving forbidden
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Published version: archiving allowed
Data provided by SHERPA/RoMEO

Abstract

We report a large-scale coronal wave (so-called "EIT wave") observed with high cadence by EUVI onboard STEREO in association with the GOES B9.5 flare and double CME event on 19 May 2007. The EUVI instruments provide us with the unprecedented opportunity to study the {\it dynamics} of flare/CME associated coronal waves imaged in the extreme ultraviolet. The coronal wave under study reveals deceleration, indicative of a freely propagating MHD wave. Complementary analysis of the associated flare and erupting filament/CME hint at wave initiation by the CME expanding flanks, which drive the wave only over a limited distance. The associated flare is very weak and occurs too late to account for the wave initiation. ; Comment: Astrophysical Journal Letters (in press)