Linking Remote-Sensing and <Emphasis Type="Italic">In Situ</Emphasis> Observations of Coronal Mass Ejections Using STEREO |
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| Authors: | L Rodriguez M Mierla A N Zhukov M West E Kilpua |
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| Institution: | 1.Solar–Terrestrial Center of Excellence – SIDC,Royal Observatory of Belgium,Brussels,Belgium;2.Institute of Geodynamics of the Romanian Academy,Bucharest-37,Romania;3.Research Center for Atomic Physics and Astrophysics, Faculty of Physics,University of Bucharest,Magurele – Ilfov,Romania;4.Skobeltsyn Institute of Nuclear Physics,Moscow State University,Moscow,Russia;5.Department of Physics, Theoretical Physics Division,University of Helsinki,Helsinki,Finland |
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| Abstract: | The twin STEREO spacecraft have been observing the Sun since 2006. Even though STEREO has only been active during solar minimum
conditions so far, an important number of coronal mass ejections (CMEs) and their interplanetary counterparts (ICMEs) have
been observed. Many of the ICMEs can be linked back to the corresponding CMEs on the Sun through the combination of remote-sensing
and in situ observations. This paper aims to answer the question whether a CME observed by a coronagraph will be detected in situ by a spacecraft in a specific location in the heliosphere. We use a flux-rope-like model fit to the STEREO SECCHI/COR2 data
to obtain the direction of CME propagation and its geometrical configuration in three dimensions. Based on model parameters,
we then calculate their angular widths and determine whether they should have been detected by STEREO-A, STEREO-B, Wind or ACE. We compare the results with corresponding in situ observations of ICMEs. We find that predictions of ICME detections on the base of COR2 data generally match well the actual
in situ observations. |
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