Compound Twin Coronal Mass Ejections in the 2012 May 17 Gle Event

Shen, Chenglong; Li, G.; Kong, Xiangliang; Hu, Junxiang; Sun, Xudong; Ding, Long; Chen, Yao; Wang, Yuming; Xia, Li

doi:10.1088/0004-637x/763/2/114

Cited by 48 publications

(43 citation statements)

References 19 publications

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“…These kinds of consecutive CMEs with extremely short waiting times are sometimes called "twin-CMEs" or "sympathetic-CMEs," although they are not necessarily produced from the same AR (e.g., Balasubramaniam et al 2011;Schrijver & Title 2011;Yang et al 2012;Ding et al 2013Ding et al , 2014Shen et al 2013). The source locations of a D-type QH CME and its predecessor are expected to be located close to each other, or have some magnetic connection in which one eruption can induce the other one.…”

Section: Summary and Discussionmentioning

confidence: 99%

The Causes of Quasi-homologous CMEs

Liu

Wang

et al. 2017

ApJ

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In this paper, we identified the magnetic source locations of 142 quasi-homologous (QH) coronal mass ejections (CMEs), of which 121 are from solar cycle (SC) 23 and 21 from SC 24. Among those CMEs, 63% originated from the same source location as their predecessor (defined as S-type), while 37% originated from a different location within the same active region as their predecessor (defined as D-type). Their distinctly different waiting time distributions, peaking around 7.5 and 1.5hr for S-and D-type CMEs, suggest that they might involve different physical mechanisms with different characteristic timescales. Through detailed analysis based on nonlinear forcefree coronal magnetic field modeling of two exemplary cases, we propose that the S-type QH CMES might involve a recurring energy release process from the same source location (by magnetic free energy replenishment), whereas the D-type QH CMEs can happen when a flux tube system is disturbed by a nearby CME.

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Section: Summary and Discussionmentioning

confidence: 99%

The Causes of Quasi-homologous CMEs

Liu

Wang

et al. 2017

ApJ

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“…The wave nature of EUV waves was also established based on the fact that they are reflected from nearby coronal holes (Long et al 2008(Long et al , 2013Gopalswamy et al 2009c;Olmedo et al 2012;Shen et al 2013a;Kienreich et al 2013: Kwon et al 2013). Gopalswamy and Yashiro (2011) estimated the coronal magnetic field within the SOHO coronagraphic field of view (6 to 23 Rs) using the fact that the standoff distance of the white-light shock with respect to the radius of curvature of the driving flux rope is related to the shock Mach number and the adiabatic index (Russell and Mulligan 2002;Savani et al 2012).…”

Section: Figure 14mentioning

confidence: 99%

Short-term variability of the Sun-Earth system: an overview of progress made during the CAWSES-II period

Gopalswamy

Tsurutani

Yan

2015

Prog. in Earth and Planet. Sci.

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This paper presents an overview of results obtained during the CAWSES-II period on the short-term variability of the Sun and how it affects the near-Earth space environment. CAWSES-II was planned to examine the behavior of the solar-terrestrial system as the solar activity climbed to its maximum phase in solar cycle 24. After a deep minimum following cycle 23, the Sun climbed to a very weak maximum in terms of the sunspot number in cycle 24 (MiniMax24), so many of the results presented here refer to this weak activity in comparison with cycle 23. The short-term variability that has immediate consequence to Earth and geospace manifests as solar eruptions from closed-field regions and high-speed streams from coronal holes. Both electromagnetic (flares) and mass emissions (coronal mass ejections -CMEs) are involved in solar eruptions, while coronal holes result in high-speed streams that collide with slow wind forming the so-called corotating interaction regions (CIRs). Fast CMEs affect Earth via leading shocks accelerating energetic particles and creating large geomagnetic storms. CIRs and their trailing high-speed streams (HSSs), on the other hand, are responsible for recurrent small geomagnetic storms and extended days of auroral zone activity, respectively. The latter leads to the acceleration of relativistic magnetospheric 'killer' electrons. One of the major consequences of the weak solar activity is the altered physical state of the heliosphere that has serious implications for the shock-driving and storm-causing properties of CMEs. Finally, a discussion is presented on extreme space weather events prompted by the 23 July 2012 super storm event that occurred on the backside of the Sun. Many of these studies were enabled by the simultaneous availability of remote sensing and in situ observations from multiple vantage points with respect to the Sun-Earth line.

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“…We have also described a new paradigm of quadrupolar eruptions, i.e., two flux ropes embedded in the two side arcades first interact to cut the constraining "tethers," and consequently erupt in close succession and proximity, effectively manifesting as a "twin" eruption (e.g., Shen et al 2013).…”

Section: Role Of Reconnectionmentioning

confidence: 99%

A Prominence Eruption Driven by Flux Feeding From Chromospheric Fibrils

Zhang

Wang

et al. 2014

ApJ

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We present multi-wavelength observations of a prominence eruption originating from a quadrupolar field configuration, in which the prominence was embedded in a side arcade. Within the two-day period prior to its eruption on 2012 October 22, the prominence was perturbed three times by chromospheric fibrils underneath, which rose upward, became brightened, and merged into the prominence, resulting in horizontal flows along the prominence axis, suggesting that the fluxes carried by the fibrils were incorporated into the magnetic field of the prominence. These perturbations caused the prominence to oscillate and to rise faster than before. The absence of intense heating within the first two hours after the onset of the prominence eruption, which followed an exponential increase in height, indicates that ideal instability played a crucial role. The eruption involved interactions with the other side arcade, leading up to a twin coronal mass ejection, which was accompanied by transient surface brightenings in the central arcade, followed by transient dimmings and brightenings in the two side arcades. We suggest that flux feeding from chromospheric fibrils might be an important mechanism to trigger coronal eruptions.

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Compound Twin Coronal Mass Ejections in the 2012 May 17 Gle Event

Cited by 48 publications

References 19 publications

The Causes of Quasi-homologous CMEs

The Causes of Quasi-homologous CMEs

Short-term variability of the Sun-Earth system: an overview of progress made during the CAWSES-II period

A Prominence Eruption Driven by Flux Feeding From Chromospheric Fibrils

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