Subarcsecond blobs in flare-related coronal jets
arXiv:1811.08570 · doi:10.3847/1538-4357/aaf391
Abstract
In this paper, we report our multiwavelength observations of subarcsecond blobs in coronal jets. In AR 12149, a C5.5 circular-ribbon flare occurred on 2014 August 24. Two jets (jet1 and jet2) were related to the flare. Jet1 appeared first. Jet2 appeared 6 minutes later. During its initial phase, a big plasmoid was ejected out of jet2. After the flare peak time, multiple bright and compact blobs appeared in the lower part of jet2, which were observed by IRIS/SJI. The blobs observed by SJI in 1330 Å have sizes of 0$\farcs$451$\farcs$35, nearly 84\% of which are subarcsecond (1\arcsec). The mean value and standard deviation of the sizes are 0$\farcs$78 and 0$\farcs$19, respectively. The velocities of the blobs range from 10 to more than 220 km s. Three of the blobs had their counterparts in EUV wavelengths observed by SDO/AIA. The velocities are almost identical in UV and EUV wavelengths. We propose that the blobs observed in 1330 Å are the cool component (0.025 MK), while the blobs observed in EUV are the hot component of several MK. In jet1, only one blob was present. We conclude that the blobs are created by the tearing-mode instability of the current sheet at the base or inside the coronal jets. Our results have important implication for uncovering the fine structures of coronal jets and understanding the relationship between the blobs observed in UV and EUV wavelengths.
arXiv comment14 pages, 10 figures, 2 tables, accepted for publication in ApJ
References in corpus (52)
- The Interface Region Imaging Spectrograph (IRIS)
- Fast Reconnection in High-Lundquist-Number Plasmas Due to Secondary Tearing Instabilities
- A Tale Of Two Spicules: The Impact of Spicules on the Magnetic Chromosphere
- Plasmoid-Induced-Reconnection and Fractal Reconnection
- Solar Coronal Jets: Observations, Theory, and Modeling
- Small-scale filament eruptions as the driver of solar coronal hole X-ray jets
- Prevalence of Small-scale Jets from the Networks of the Solar Transition Region and Chromosphere
- Differential Emission Measure Analysis of Multiple Structural Components of Coronal Mass Ejections in the Inner Corona
- Scaling laws of resistive magnetohydrodynamic reconnection in the high-Lundquist-number, plasmoid-unstable regime
- Jets in coronal holes: Hinode observations and 3D computer modelling
- Characteristics of EUV coronal jets observed with STEREO/SECCHI
- Simultaneous Observation of Reconnection Inflow and Outflow Associated with the 2010 August 18 Solar Flare
- General Theory of the Plasmoid Instability
- Observations of Turbulent Magnetic Reconnection Within a Solar Current Sheet
- A Breakout Model for Solar Coronal Jets with Filaments
- Fast magnetic reconnection in the solar chromosphere mediated by the plasmoid instability
- Magnetic Flux Cancellation as the Trigger of Solar Quiet-Region Coronal Jets
- Magnetic reconnection between a solar filament and nearby coronal loops
- Blobs in recurring EUV jets
- On a solar blowout jet: driven mechanism and the formation of cool and hot components
- On the Distribution of Plasmoids In High-Lundquist-Number Magnetic Reconnection
- Three-Dimensional Simulations of Tearing and Intermittency in Coronal Jets
- Intermittent reconnection and plasmoids in UV bursts in the low solar atmosphere
- Plasmoid Instability in Evolving Current Sheets and Onset of Fast Reconnection
- Three-dimensional oscillatory magnetic reconnection
- Coronal hole boundaries at small scales: IV. SOT view Magnetic field properties of small-scale transient brightenings in coronal holes
- Heating mechanisms in the low solar atmosphere through magnetic reconnection in current sheets
- Explosive Chromospheric Evaporation in a Circular-ribbon Flare
- Multiwavelength observations of a partially eruptive filament on 2011 September 8
- Chromospheric Condensation and Quasi-periodic Pulsations in a Circular-ribbon Flare
- Blob formation and ejection in coronal jets due to the plasmoid and Kelvin-Helmholtz instabilities
- Two Episodes of Magnetic Reconnections During a Confined Circular-ribbon Flare
- A swirling flare-related EUV jet
- Simultaneous EUV and Radio Observations of Bidirectional Plasmoids Ejection During Magnetic Reconnection
- Fermi Acceleration in Plasmoids interacting with Fast Shocks of Reconnection via Fractal Reconnection
- Observations of solar X-ray and EUV jets and their related phenomena
- Simultaneous transverse and longitudinal oscillations in a quiescent prominence triggered by a coronal jet
- A magnetic reconnection event in the solar atmosphere driven by relaxation of a twisted arch filament system
- Impact of Temperature-dependent resistivity and thermal conduction on plasmoid Instabilities in current sheets in the solar corona
- Dynamics and plasma properties of an X-ray jet from SUMER, EIS, XRT and EUVI A & B simultaneous observations
- Coronal hole boundaries at small scales: III. EIS and SUMER views
- Observations of the Formation, Development, and Structure of a Current Sheet in an Eruptive Solar Flare
- Successive Two-sided loop Jets Caused by Magnetic Reconnection between Two adjacent Filamentary Threads
- Observations of multiple blobs in homologous solar coronal jets in closed loops
- Onset of secondary instabilities and plasma heating during magnetic reconnection in strongly magnetized regions of the low solar atmosphere
- Two-sided-loop jets associated with magnetic reconnection between emerging loops and twisted filament threads
- The Role of a Flux Rope Ejection in Three-dimensional Magnetohydrodynamic Simulation of a Solar Flare
- Magnetic braids in eruptions of a spiral structure in the solar atmosphere
- Effects of the non-uniform initial environment and the guide field on the plasmoid instability
- A solar blowout jet caused by the eruption of a magnetic flux rope
- Cusp-shaped structure of a jet observed by IRIS and SDO
- Numerical Studies of the Kelvin-Hemholtz Instability in the Coronal Jet
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- Observation and Modeling of Solar Jets
- Stereoscopic Observations of an Erupting Mini-filament Driven Two-Sided-Loop Jet and the Applications for Diagnosing Filament Magnetic field
- Onset of turbulent fast magnetic reconnection observed in the solar atmosphere
- Coronal Mini-jets in an Activated Solar Tornado-like Prominence
- Spectroscopic observations of a flare-related coronal jet
- Spectroscopic and Stereoscopic Observations of the Solar Jets
- A highly dynamic small-scale jet in a polar coronal hole
- Heating at the remote footpoints as a brake on jet flows along loops in the solar atmosphere
- Statistical analysis of circular-ribbon flares
- Formation of solar quiescent coronal loops through magnetic reconnection in an emerging active region
- Energy partition in two M-class circular-ribbon flares
- Origin of Quasi-Periodic Pulsation at the Base of Kink Unstable Jet
- Evidence of external reconnection between an erupting mini-filament and ambient loops observed by Solar Orbiter/EUI
- Power-law Distribution of Solar-Cycle Modulated Coronal Jets
- Imaging observations of chromospheric evaporation in a circular-ribbon flare
- Fast degradation of the circular flare ribbon on 2014 August 24
- Thin coronal jets and plasmoid-mediated reconnection: Insights from Solar Orbiter observations and Bifrost simulations
- Morphological evidence for nanoflares heating warm loops in the solar corona
- Formation and Thermodynamic Evolution of plasmoids in active region jets
- 3D structures of the base of small-scale recurrent jets revealed by Solar orbiter
- An EUV jet driven by a series of transition region micro-jets
- Recurrent coronal jets observed by SDO/AIA
- The plasmoid instability in a confined solar flare
- A new view of the solar interface region from the Interface Region Imaging Spectrograph (IRIS)
- Magnetic reconnection in partially ionized plasmas