LASCO and EIT Observations of Helical Structure in Coronal Mass Ejections
| Autor: | Kenneth P. Dere, Guenter E. Brueckner, D. J. Michels, Russell A. Howard, Jean-Pierre Delaboudiniere |
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| Rok vydání: | 1999 |
| Předmět: |
Physics
Astronomy Astronomy and Astrophysics Astrophysics Corona Magnetic flux law.invention Telescope Space and Planetary Science law Observatory Physics::Space Physics Extreme ultraviolet Imaging Telescope Coronal mass ejection Astrophysics::Solar and Stellar Astrophysics Magnetic cloud Coronagraph |
| Zdroj: | The Astrophysical Journal. 516:465-474 |
| ISSN: | 1538-4357 0004-637X |
| Popis: | Observations of coronal mass ejections (CMEs) by the Large Angle Spectrometric Coronagraph (LASCO) on the Solar and Heliospheric Observatory (SOHO) show a significant fraction with circular intensity patterns. In the past, these would have been called "disconnection" events, but we suggest that these are evidence of CMEs containing helical magnetic flux ropes that are often central to many theoretical models of CMEs and have been observed in magnetic clouds near 1 AU. Three examples are examined in detail with the LASCO and Extreme-Ultraviolet Imaging Telescope (EIT) data sets, which provide observations from their initiation through 30 R☉. |
| Databáze: | OpenAIRE |
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