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The near-Sun kinematics of coronal mass ejections (CMEs) determine the severity and arrival time of associated geomagnetic storms. We investigate the relationship between the deprojected speed and kinetic energy of CMEs and magnetic…

太阳与恒星天体物理 · 物理学 2018-09-19 Sanchita Pal , Dibyendu Nandy , Nandita Srivastava , Nat Gopalswamy , Suman Panda

We investigate the relationship between the monthly averaged maximal speeds of coronal mass ejections (CMEs), international sunspot number (ISSN), and the geomagnetic Dst and Ap indices covering the 1996-2008 time interval (solar cycle 23).…

太阳与恒星天体物理 · 物理学 2011-11-18 A. Kilcik , V. B. Yurchyshyn , V. Abramenko , P. R. Goode , N. Gopalswamy , A. Ozguc , J. P. Rozelot

Solar flares and coronal mass ejections (CMEs) are closely coupled through magnetic reconnection. CMEs are usually accelerated impulsively within the low solar corona, synchronized with the impulsive flare energy release. We investigate the…

Theoretically, CME kinematics are related to magnetic reconnection processes in the solar corona. However, the current quantitative understanding of this relationship is based on the analysis of only a handful of events. Here we report a…

太阳与恒星天体物理 · 物理学 2020-05-06 Chunming Zhu , Jiong Qiu , Paulett Liewer , Angelos Vourlidas , Michael Spiegel , Qiang Hu

It is now generally accepted that the impulsive acceleration of a coronal mass ejection (CME) in the inner corona is closely correlated in time with the main energy release of the associated solar flare. In this paper, we examine in detail…

太阳与恒星天体物理 · 物理学 2015-05-18 X. Cheng , J. Zhang , M. D. Ding , W. Poomvises

Coronal mass ejections (CMEs) have become one of the key indicators of solar activity, especially in terms of the consequences of the transient events in the heliosphere. Although CMEs are closely related to the sunspot number (SSN), they…

太阳与恒星天体物理 · 物理学 2019-01-30 Nat Gopalswamy

In this paper, we analyze 91 coronal mass ejection (CME) events studied by Manoharan et al. (2004) and Gopalswamy and Xie (2008). These earth-directed CMEs are large (width $>$160$^\circ$) and cover a wide range of speeds ($\sim$120--2400…

太阳与恒星天体物理 · 物理学 2015-05-20 P. K. Manoharan , A. Mujiber Rahman

We study the interaction of two successive coronal mass ejections (CMEs) during the 2010 August 1 events using STEREO/SECCHI COR and HI data. We obtain the direction of motion for both CMEs by applying several independent reconstruction…

Understanding coronal mass ejection (CME) energetics and dynamics has been a long-standing problem, and although previous observational estimates have been made, such studies have been hindered by large uncertainties in CME mass. Here, the…

太阳与恒星天体物理 · 物理学 2015-06-04 Eoin P. Carley , R. T. James McAteer , Peter T. Gallagher

The relationships between solar flare parameters (total importance, time duration, flare index, and flux) and sunspot activity (Rz) as well as those between geomagnetic activity (aa index) and the flare parameters can be well described by…

太阳与恒星天体物理 · 物理学 2015-06-03 Z. L. Du , H. N. Wang

We investigated some properties of coronal mass ejections (CMEs), such as speed, acceleration, polar angle, angular width, and mass, using data acquired by the Large Angle Spectrometric Coronagraph (LASCO) onboard the Solar and Heliospheric…

太阳与恒星天体物理 · 物理学 2016-12-30 A. Compagnino , P. Romano , F. Zuccarello

Two major processes have been proposed to convert the coronal magnetic energy into the kinetic energy of a coronal mass ejection (CME): resistive magnetic reconnection and ideal macroscopic magnetohydrodynamic instability of magnetic flux…

太阳与恒星天体物理 · 物理学 2015-06-16 H. Q. Song , Y. Chen , D. D. Ye , G. Q. Han , G. H. Du , G. Li , J. Zhang , Q. Hu

We study the clustering properties of fast Coronal Mass Ejections (CMEs) that occurred during solar cycles 23 and 24. We apply two methods: the Max spectrum method can detect the predominant clusters and the de-clustering threshold time…

The statistical study of the Coronal Mass Ejections (CMEs) is a hot topic in solar physics. To further reveal the temporal and spatial behaviors of the CMEs at different latitudes and heights, we analyzed the correlation and phase…

太阳与恒星天体物理 · 物理学 2022-06-22 Jiaqi Lin , Feng Wang , Linhua Deng , Hui Deng , Ying Mei , Yangfan Xie

A statistical analysis of the relationship between solar energetic particles (SEPs) and properties of solar flares and coronal mass ejections (CMEs) is presented. SEP events during solar cycle 23 are selected which are associated with solar…

太阳与恒星天体物理 · 物理学 2014-12-18 M. Dierckxsens , K. Tziotziou , S. Dalla , I. Patsou , M. S. Marsh , N. B. Crosby , O. Malandraki , G. Tsiropoula

Similar to the Sun, other stars shed mass and magnetic flux via ubiquitous quasi-steady wind and episodic stellar coronal mass ejections (CMEs). We investigate the mass loss rate via solar wind and CMEs as a function of solar magnetic…

太阳与恒星天体物理 · 物理学 2019-04-23 Wageesh Mishra , Nandita Srivastava , Yuming Wang , Zavkiddin Mirtoshev , Jie Zhang , Rui Liu

We investigate the relationship between the main acceleration phase of coronal mass ejections (CMEs) and the particle acceleration in the associated flares as evidenced in RHESSI non-thermal X-rays for a set of 37 impulsive flare-CME…

太阳与恒星天体物理 · 物理学 2012-05-14 S. Berkebile-Stoiser , A. M. Veronig , B. M. Bein , M. Temmer

Understanding the trajectory of a coronal mass ejection (CME), including any deflection from a radial path, and the orientation of its magnetic field is essential for space weather predictions. Kay et al. (2015b) developed a model,…

太阳与恒星天体物理 · 物理学 2015-10-07 C. Kay , M. Opher

The free energy that is dissipated in a magnetic reconnection process of a solar flare, generally accompanied by a coronal mass ejection (CME), has been considered as the ultimate energy source of the global energy budget of solar flares in…

太阳与恒星天体物理 · 物理学 2019-06-19 Markus J. Aschwanden , Nat Gopalswamy

The newly revised sunspot number series allows for placing historical geoeffective storms in the context of several hundred years of solar activity. Using statistical analyses of the Geostationary Operational Environmental Satellites (GOES)…

太阳与恒星天体物理 · 物理学 2016-06-01 Lisa M. Winter , Rick Pernak , K. S. Balasubramaniam
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