Journal ArticleDOI
A Model for Solar Coronal Mass Ejections
TLDR
In this article, a magnetic breakout model for the initiation of a solar coronal mass ejection (CME) was proposed, where reconnection between a sheared arcade and neighboring flux systems triggers the eruption.Abstract:
We propose a new model for the initiation of a solar coronal mass ejection (CME). The model agrees with two properties of CMEs and eruptive flares that have proved to be very difficult to explain with previous models: (1) very low-lying magnetic field lines, down to the photospheric neutral line, can open toward infinity during an eruption; and (2) the eruption is driven solely by magnetic free energy stored in a closed, sheared arcade. Consequently, the magnetic energy of the closed state is well above that of the posteruption open state. The key new feature of our model is that CMEs occur in multipolar topologies in which reconnection between a sheared arcade and neighboring flux systems triggers the eruption. In this "magnetic breakout" model, reconnection removes the unsheared field above the low-lying, sheared core flux near the neutral line, thereby allowing this core flux to burst open. We present numerical simulations that demonstrate our model can account for the energy requirements for CMEs. We discuss the implication of the model for CME/flare prediction.read more
Citations
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Journal ArticleDOI
Critical Science Plan for the Daniel K. Inouye Solar Telescope (DKIST)
Mark Rast,Nazaret Bello González,Luis R. Bellot Rubio,Wenda Cao,Gianna Cauzzi,Edward E. DeLuca,Bart De Pontieu,Lyndsay Fletcher,Sarah Gibson,Philip G. Judge,Yukio Katsukawa,Maria D. Kazachenko,Elena Khomenko,Enrico Landi,Valentin Martinez Pillet,Gordon Petrie,Jiong Qiu,Laurel A. Rachmeler,Matthias Rempel,Wolfgang Schmidt,Eamon Scullion,Xudong Sun,Brian T. Welsch,Vincenzo Andretta,Patrick Antolin,Thomas R. Ayres,Krishnan Balasubramaniam,Istvan Ballai,Thomas E. Berger,Stephen J. Bradshaw,Mats Carlsson,Roberto Casini,Rebecca Centeno,Steven R. Cranmer,Craig DeForest,Yuanyong Deng,Robertus Erdélyi,Viktor Fedun,Catherine E. Fischer,Sergio Javier González Manrique,Michael Hahn,Louise K. Harra,Vasco Manuel de Jorge Henriques,Neal E. Hurlburt,Sarah A. Jaeggli,Shahin Jafarzadeh,Rekha Jain,Stuart M. Jefferies,P. H. Keys,Adam F. Kowalski,Christoph Kuckein,Jeff Kuhn,Jiajia Liu,Wei Liu,Dana Longcope,R. T. James McAteer,Scott W. McIntosh,David E. McKenzie,Mari Paz Miralles,Richard Morton,Karin Muglach,Chris J. Nelson,Navdeep K. Panesar,Susanna Parenti,Clare E. Parnell,Bala Poduval,Kevin Reardon,Jeffrey W. Reep,Thomas A. Schad,Donald Schmit,Rahul Sharma,Hector Socas-Navarro,Abhishek K. Srivastava,Alphonse C. Sterling,Yoshinori Suematsu,Lucas A. Tarr,Sanjiv K. Tiwari,Alexandra Tritschler,Gary Verth,Angelos Vourlidas,Haimin Wang,Yi-Ming Wang,Dkist,Dkist instrument scientists +83 more
TL;DR: The Daniel K. Inouye Solar Telescope (DKIST) will revolutionize our ability to measure, understand and model the basic physical processes that control the structure and dynamics of the Sun and its atmosphere.
Book ChapterDOI
The Solar Sources of Geoeffective Structures
TL;DR: In this paper, the authors review the current understanding of the solar sources of interplanetary structures that result in geomagnetic disturbances, especially storms, and they show that the largest recurrent geOMagnetic storms are actually caused by CMEs caught up in the corotating interaction region (CIR).
Journal ArticleDOI
Energy buildup of multipolar magnetic fields by photospheric shear motion
TL;DR: In this article, a numerical study of the energy buildup of coronal magnetic fields by photospheric shear motions is presented, and it is shown that the magnetic energy of the sheared force-free field cannot exceed that of the corresponding partly open field in which the central and overlying arcades become fully open but the bipolar fields at the flank remain closed.
Journal ArticleDOI
Multiwavelength observation of a large-scale flux rope eruption above kinked mini-filament
Pankaj Kumar,Kyung-Suk Cho +1 more
TL;DR: In this article, multi-wavelength observations of a western limb flare (C3.9) occurred in AR NOAA 111465 on 30 April 2012, and high resolution images recorded by SDO/AIA 304, 1600 \AA\ and Hinode/SOT H$\alpha$ show the activation of a mini-filament (rising speed$\sim$40 km s$^{-1}$) associated with kink instability and the onset of a C-class flare near the southern leg of the filament.
Book ChapterDOI
The Dynamics of Eruptive Prominences
TL;DR: In this article, the authors discuss the dynamical properties of eruptive prominences in relation to coronal mass ejections (CMEs) in terms of their physical association and kinematics.
References
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Journal ArticleDOI
The solar flare myth
TL;DR: In this paper, the authors outline a different paradigm of cause and effect that removes solar flares from their central position in the chain of events leading from the Sun to near-Earth space.
Journal ArticleDOI
Disruption of Coronal Magnetic Field Arcades
Zoran Mikic,Jon A. Linker +1 more
TL;DR: In this paper, the magnetic field expands outward in a process that opens the field lines and produces a tangential discontinuity, leading to an impulsive release of magnetic energy, fast flows, and the ejection of a plasmoid.
Journal ArticleDOI
Coronal mass ejections - 1979-1981
TL;DR: An overview of observations of coronal mass ejections (CMEs) during the interval March 28, 1979 through December 31, 1981 is presented in this paper, where an introduction is provided to the instrument used in the observations, the method of identifying CMEs, the concepts of CME structural classes, CME importance categories, and the distribution of mass ejection among these classes and categories.
Journal ArticleDOI
On some properties of force-free magnetic fields in infinite regions of space
TL;DR: In this article, a priori inequalities are defined which must be satisfied by the force-free equations, and upper bounds for the magnetic energy of the region provided the value of the magnetic normal component at the boundary of a region can be shown to decay sufficiently fast at infinity.
Journal ArticleDOI
Force-free magnetic fields - The magneto-frictional method
TL;DR: In this article, a magneto-frictional method was proposed to calculate magnetic field configurations in which the Lorentz force j x B is everywhere zero, subject to specified boundary conditions.
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