A study of a coronal hole associated with a large filament eruption

Garro, Heidy Gutiérrez; Enacolopas, Lela Taliashvili; Lazarian, A.; Mouradian, Z.

doi:10.1093/mnras/stx1866

Cited by 7 publications

(3 citation statements)

References 70 publications

(71 reference statements)

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“…In the post-eruption configuration, field lines close down, ensuing a significant decrease in coronal-hole area, consistent with the purple patch in the second image on the fifth row of Figure 2. Such transient changes in coronal-hole area are also reported by observational studies on the evolution of coronal dimming associated with erupting CMEs (McIntosh et al, 2007;Gutiérrez et al, 2017).…”

Section: Local Measures: Spatial Distribution Of Non-potentialitysupporting

confidence: 70%

Two classes of eruptive events during Solar Minimum

Bhowmik¹,

Yeates²

2021

Preprint

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<p>During Solar Minimum, the Sun is perceived to be quite inactive with barely any spots emerging on the solar surface. Consequently, we observe a drop in the number of highly energetic events such as solar flares and coronal mass ejections (CMEs), which are often associated with active regions on the photosphere. However, our magnetofrictional simulations during the minimum period suggest that the solar corona could still be significantly dynamic while evolving in response to the large-scale shearing velocities on the solar surface. The non-potential evolution of the corona leads to the accumulation of magnetic free energy and helicity, which is periodically lost through eruptive events. Our study shows that these events can be categorised into two distinct classes. One set of events are caused due to full-scale eruption of low-lying coronal flux ropes and could be associated with occasional filament erupting CMEs observed during Solar Minimum. The other set of events are not driven by destabilisation of low-lying structures but rather by eruption from overlying sheared arcades. These could be linked with streamer blowouts or stealth CMEs. The two classes differ considerably in the amount of magnetic flux and helicity shed through the outer coronal boundary. We additionally investigate how other measurables such as current, open magnetic flux, free energy, coronal holes area, and the horizontal component of the magnetic field on the outer model boundary vary during the two classes of event. This study demonstrates and emphasises the importance and necessity of understanding the dynamics of the coronal magnetic field during Solar Minimum.</p>

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Section: Local Measures: Spatial Distribution Of Non-potentialitysupporting

confidence: 70%

Two classes of eruptive events during Solar Minimum

Bhowmik¹,

Yeates²

2021

Preprint

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“…In addition, the turbulence generated from the reconnection in one region can also trigger the reconnection in surrounding regions (LV99). Such a process was reported in the observations ofSych et al (2009Sych et al ( , 2015) (see alsoGutiérrez et al 2017).…”

supporting

confidence: 65%

Gamma-Ray Bursts Induced by Turbulent Reconnection

Lazarían¹,

Zhang

2019

ApJ

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We consider a simple model for gamma-ray bursts induced by magnetic reconnection in turbulent media. The magnetic field in a jet is subject to kink instabilities, which distort the regular structure of the spiral magnetic field, drive turbulence, and trigger reconnection. The resulting reconnection takes place in a high Reynolds number medium, where turbulence is further enhanced and in turn accelerates the reconnection process. This boot-strap reconnection gives rise to bursts of reconnection events, through which the free energy of magnetic field is transformed into a gamma-ray burst. The efficiency of magnetic reconnection and magnetic energy dissipation is not constrained by microphysical properties of plasmas.

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“…and astronomy and solar sciences (e.g. eruption of solar filaments) [7]. It is also used in sociology and politics and various other fields (e.g.…”

Section: Introductionmentioning

confidence: 99%

Tooth eruption versus tooth emergence

Shaweesh¹,

Qasim²

2019

Long-Term Survival of Patients With Ischemic Cardiomyopathy and Diabetes as Compared to Those Without Diabetes Undergoing Myoca

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The use of the term 'eruption' to designate the moment a tooth breaks out through the gum is a common linguistic misconception. We think the term 'emergence' is more appropriate. However, the dental literature has employed the term 'eruption' much earlier and more frequently. In this paper, we have addressed this misconception in detail, provided some statistics about the use of the two terms in the dental literature and provided our recommendations.

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A study of a coronal hole associated with a large filament eruption

Cited by 7 publications

References 70 publications

Two classes of eruptive events during Solar Minimum

Two classes of eruptive events during Solar Minimum

Gamma-Ray Bursts Induced by Turbulent Reconnection

Tooth eruption versus tooth emergence

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