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Coronal Mass Ejections and Magnetic Helicity
2005Coronal mass ejections (CMEs) are the most energetic events in the solar system, expelling up to 1016 g of coronal material at speeds of several hundreds or thousands of km s−1 from the Sun. As CMEs are the primary cause of space weather disturbances, we need to understand their underlying cause(s) in order to be able to predict them. After an overview
L. van Driel-Gesztelyi +1 more
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Radio Signatures of Coronal Mass Ejection Interaction: Coronal Mass Ejection Cannibalism?
The Astrophysical Journal, 2001We report the first detection at long radio wavelengths of interaction between coronal mass ejections (CMEs) in the interplanetary medium. The radio signature is in the form of intense continuum-like radio emission following an interplanetary type II burst. At the time of the radio enhancement, coronagraphic images show a fast CME overtaking a slow CME.
J. L. Bougeret +4 more
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1999
Coronal mass ejections are seen as bright features that move outward through the solar corona at speeds from 10 to about 2,000 km s-1. They involve the expulsion of substantial quantities of plasma from large regions of the corona. The spectacular nature of the largest mass ejections is illustrated in Figure 5.1 by a time sequence of four images ...
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Coronal mass ejections are seen as bright features that move outward through the solar corona at speeds from 10 to about 2,000 km s-1. They involve the expulsion of substantial quantities of plasma from large regions of the corona. The spectacular nature of the largest mass ejections is illustrated in Figure 5.1 by a time sequence of four images ...
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Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences, 1991
We summarize the observational aspects of the transient solar coronal features known as coronal mass ejections. Recognizing the importance of understanding this form of solar activity, particularly in the light of relations to flare and prominence activity, and geomagnetic effects, we consider the spectrum of models which have been used to describe ...
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We summarize the observational aspects of the transient solar coronal features known as coronal mass ejections. Recognizing the importance of understanding this form of solar activity, particularly in the light of relations to flare and prominence activity, and geomagnetic effects, we consider the spectrum of models which have been used to describe ...
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, 2014
We report ground based, low frequency heliograph (80 MHz), spectral (85–35 MHz), and polarimeter (80 and 40 MHz) observations of drifting, non-thermal radio continuum associated with the “halo” coronal mass ejection that occurred in the solar atmosphere ...
K. S. Raja +4 more
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We report ground based, low frequency heliograph (80 MHz), spectral (85–35 MHz), and polarimeter (80 and 40 MHz) observations of drifting, non-thermal radio continuum associated with the “halo” coronal mass ejection that occurred in the solar atmosphere ...
K. S. Raja +4 more
semanticscholar +1 more source
Forces governing coronal mass ejections
Advances in Space Research, 2006Kinematics of CMEs is analyzed to get an insight into the properties of forces partaking in the eruption. It is demonstrated that the Lorentz force plays a dominant role within a distance of a few solar radii. In the distance range 1– 30 solar radii, the inferred values of the Lorentz-force acceleration aL on average decrease with the ...
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Detection of Coronal Mass Ejections
2008 15th IEEE International Conference on Image Processing, 2008Coronal mass ejection (CME) events refer to the appearance of a new, discrete, white-light feature (with outward speed) in a coronagraph. The huge amount of data provided by the pertinent instruments onboard the solar and heliospheric observatory (SOHO) and, most recently, the solar terrestrial relations observatory (STEREO) makes the human-based ...
M. Marta +3 more
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Acceleration of coronal mass ejections
Journal of Geophysical Research: Space Physics, 2003The acceleration of coronal mass ejections (CMEs) is examined focusing on three specific questions raised by observations: (1) what determines the height beyond which a CME exhibits no rapid acceleration, (2) why is the main acceleration of CMEs typically limited to below 2–3 solar radii, and (3) are distinct mechanisms required to explain the apparent
James Chen, Jonathan Krall
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Dependence of solar proton events on their associated activities: Coronal mass ejection parameters
, 2012[1] In this study we have examined the occurrence probability of solar proton events (SPEs) and their peak fluxes depending on coronal mass ejection (CME) parameters, linear speed (V), angular width (AW), and location (L).
Jongyeob Park, Y. Moon, N. Gopalswamy
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