A STEREO Survey of Magnetic Cloud Coronal Mass Ejections Observed at Earth in 2008–2012
書誌事項
- 公開日
- 2017-03-29
- 権利情報
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- https://iopscience.iop.org/page/copyright
- https://iopscience.iop.org/info/page/text-and-data-mining
- DOI
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- 10.3847/1538-4365/229/2/29
- 公開者
- American Astronomical Society
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説明
<jats:title>Abstract</jats:title> <jats:p>We identify coronal mass ejections (CMEs) associated with magnetic clouds (MCs) observed near Earth by the <jats:italic>Wind</jats:italic> spacecraft from 2008 to mid-2012, a time period when the two <jats:italic>STEREO</jats:italic> spacecraft were well positioned to study Earth-directed CMEs. We find 31 out of 48 <jats:italic>Wind</jats:italic> MCs during this period can be clearly connected with a CME that is trackable in <jats:italic>STEREO</jats:italic> imagery all the way from the Sun to near 1 au. For these events, we perform full 3D reconstructions of the CME structure and kinematics, assuming a flux rope (FR) morphology for the CME shape, considering the full complement of <jats:italic>STEREO</jats:italic> and <jats:italic>SOHO</jats:italic> imaging constraints. We find that the FR orientations and sizes inferred from imaging are not well correlated with MC orientations and sizes inferred from the <jats:italic>Wind</jats:italic> data. However, velocities within the MC region are reproduced reasonably well by the image-based reconstruction. Our kinematic measurements are used to provide simple prescriptions for predicting CME arrival times at Earth, provided for a range of distances from the Sun where CME velocity measurements might be made. Finally, we discuss the differences in the morphology and kinematics of CME FRs associated with different surface phenomena (flares, filament eruptions, or no surface activity).</jats:p>
収録刊行物
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- The Astrophysical Journal Supplement Series
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The Astrophysical Journal Supplement Series 229 (2), 29-, 2017-03-29
American Astronomical Society
