Abstract:We present the observations of a double-decker filament to study its formation, triggering, and eruption physics. It is observed that the double-decker filament was formed by splitting of an original single filament. During the splitting process, intermittent bright point bursts are observed in the filament channel, which resulted in the generation of the upper filament branch. The eruption of the newly formed double-decker filament was possibly triggered by two recurrent two-sided loop jets in the filament ch… Show more
“…So far, the finding of blowout jets has been confirmed by many observational studies, and now we recognize that the vast majority of solar jets are caused by magnetic flux cancellation rather than flux emergence [63,69–84]. Recently, high-resolution observational studies have shown that two-sided-loop jets are also associated with flux cancellations and include the eruption of mini-filaments inside the base arches [44,46,49,85,86], and two-sided-loop jets occurring in filament channels may be important for causing the eruption of large filaments [87]. Figure 2An example of blowout jets [63].…”
Section: Observational Featurementioning
confidence: 99%
“…Shen et al [44] reported that a two-sided-loop jet ejects material into an overlying large filament from below through magnetic reconnection, which provided an alternative way to understand how jet material injects into filament structures. In a recurrent two-sided-loop jet event in a filament channel, Tian et al [87] found that the first jet caused the splitting of an overlying large filament into a double-decker filament, and then the following jets finally led to the full eruption of the filament. These studies showed the close relationship between solar jets and filaments, but detailed physical connection between them still needs further observational and theoretical investigations.…”
Section: Relation To Other Phenomenamentioning
confidence: 99%
“…However, the authors did not determine the relationship between the jets and the flux emergence. In many observations, opposite polarities firstly show emergence, which is then followed by flux cancellation, and the associated jets often occurred right after the start of flux cancellation [37,46,63,69,87]. Such a magnetic flux variation pattern suggests that the trigger for the jets should be flux cancellations.…”
Section: Physical Interpretation and Modellingmentioning
The solar atmosphere is full of complicated transients manifesting the reconfiguration of the solar magnetic field and plasma. Solar jets represent collimated, beam-like plasma ejections; they are ubiquitous in the solar atmosphere and important for our understanding of solar activities at different scales, the magnetic reconnection process, particle acceleration, coronal heating, solar wind acceleration, as well as other related phenomena. Recent high-spatio-temporal-resolution, wide-temperature coverage and spectroscopic and stereoscopic observations taken by ground-based and space-borne solar telescopes have revealed many valuable new clues to restrict the development of theoretical models. This review aims at providing the reader with the main observational characteristics of solar jets, physical interpretations and models, as well as unsolved outstanding questions in future studies.
“…So far, the finding of blowout jets has been confirmed by many observational studies, and now we recognize that the vast majority of solar jets are caused by magnetic flux cancellation rather than flux emergence [63,69–84]. Recently, high-resolution observational studies have shown that two-sided-loop jets are also associated with flux cancellations and include the eruption of mini-filaments inside the base arches [44,46,49,85,86], and two-sided-loop jets occurring in filament channels may be important for causing the eruption of large filaments [87]. Figure 2An example of blowout jets [63].…”
Section: Observational Featurementioning
confidence: 99%
“…Shen et al [44] reported that a two-sided-loop jet ejects material into an overlying large filament from below through magnetic reconnection, which provided an alternative way to understand how jet material injects into filament structures. In a recurrent two-sided-loop jet event in a filament channel, Tian et al [87] found that the first jet caused the splitting of an overlying large filament into a double-decker filament, and then the following jets finally led to the full eruption of the filament. These studies showed the close relationship between solar jets and filaments, but detailed physical connection between them still needs further observational and theoretical investigations.…”
Section: Relation To Other Phenomenamentioning
confidence: 99%
“…However, the authors did not determine the relationship between the jets and the flux emergence. In many observations, opposite polarities firstly show emergence, which is then followed by flux cancellation, and the associated jets often occurred right after the start of flux cancellation [37,46,63,69,87]. Such a magnetic flux variation pattern suggests that the trigger for the jets should be flux cancellations.…”
Section: Physical Interpretation and Modellingmentioning
The solar atmosphere is full of complicated transients manifesting the reconfiguration of the solar magnetic field and plasma. Solar jets represent collimated, beam-like plasma ejections; they are ubiquitous in the solar atmosphere and important for our understanding of solar activities at different scales, the magnetic reconnection process, particle acceleration, coronal heating, solar wind acceleration, as well as other related phenomena. Recent high-spatio-temporal-resolution, wide-temperature coverage and spectroscopic and stereoscopic observations taken by ground-based and space-borne solar telescopes have revealed many valuable new clues to restrict the development of theoretical models. This review aims at providing the reader with the main observational characteristics of solar jets, physical interpretations and models, as well as unsolved outstanding questions in future studies.
“…So far, the finding of blowout jets has been confirmed by many observational studies, and now we recognized that the vast majority of solar jets are caused by magnetic flux cancellation rather than flux emergence [62,[69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84]. Recently, high resolution observational studies showed that two-sidedloop jets are also associated with flux cancellations and include the eruption of mini-filaments inside the base arches [43,46,49,85,86], and two-sided-loop jets occurring in filament channels may important for causing the eruption of large filaments [87].…”
Section: Observational Feature (A) Morphology and Classificationmentioning
confidence: 67%
“…Shen et al [43] reported that a two-sided-loop jet ejects material into an overlying large filament from below through magnetic reconnection, which provided an alternative way to understand how jet material injects into filament structures. In a recurrent two-sided-loop jet event occurred in a filament channel, Tian et al [87] found that the first jet firstly caused the splitting of an overlying large filament into a double-decker filament, and then the following jets finally led to the fully eruption of the filament. These studies showed the close relationship between solar jets and filaments, but detailed physical connection between them still needs further observational and theoretical investigations.…”
The solar atmosphere is full of complicated transients manifesting the reconfiguration of solar magnetic field and plasma. Solar jets represent collimated, beam-like plasma ejections; they are ubiquitous in the solar atmosphere and important for the understanding of solar activities at different scales, magnetic reconnection process, particle acceleration, coronal heating, solar wind acceleration, as well as other related phenomena. Recent high spatiotemporal resolution, wide-temperature coverage, spectroscopic, and stereoscopic observations taken by ground-based and space-borne solar telescopes have revealed many valuable new clues to restrict the development of theoretical models. This review aims at providing the reader with the main observational characteristics of solar jets, physical interpretations and models, as well as unsolved outstanding questions in future studies.
Magnetic flux ropes are characterized by coherently twisted magnetic field lines, which are ubiquitous in magnetized plasmas. As the core structure of various eruptive phenomena in the solar atmosphere, flux ropes hold the key to understanding the physical mechanisms of solar eruptions, which impact the heliosphere and planetary atmospheres. The strongést disturbances in the Earth’s space environments are often associated with large-scale flux ropes from the Sun colliding with the Earth’s magnetosphere, leading to adverse, sometimes catastrophic, space-weather effects. However, it remains elusive as to how a flux rope forms and evolves toward eruption, and how it is structured and embedded in the ambient field. The present paper addresses these important questions by reviewing current understandings of coronal flux ropes from an observer’s perspective, with an emphasis on their structures and nascent evolution toward solar eruptions, as achieved by combining observations of both remote sensing and in-situ detection with modeling and simulation. This paper highlights an initiation mechanism for coronal mass ejections (CMEs) in which plasmoids in current sheets coalesce into a ‘seed’ flux rope whose subsequent evolution into a CME is consistent with the standard model, thereby bridging the gap between microscale and macroscale dynamics.
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