Revisiting the formation mechanism for coronal rain from previous studies
arXiv:2107.01339 · doi:10.1088/1674-4527/21/10/255
Abstract
Solar coronal rain is classified generally into two categories: flare-driven and quiescent coronal rain. The latter is observed to form along both closed and open magnetic field structures. Recently, we proposed that some of the quiescent coronal rain events, detected in the transition region and chromospheric diagnostics, along loop-like paths could be explained by the formation mechanism for quiescent coronal rain facilitated by interchange magnetic reconnection between open and closed field lines. In this study, we revisited 38 coronal rain reports from the literature. From these earlier works, we picked 15 quiescent coronal rain events out of the solar limb, mostly suggested to occur in active region closed loops due to thermal nonequilibrium, to scrutinize their formation mechanism. Employing the extreme ultraviolet images and line-of-sight magnetograms, the evolution of the quiescent coronal rain events and their magnetic fields and context coronal structures is examined. We find that 6, comprising 40%, of the 15 quiescent coronal rain events could be totally or partially interpreted by the formation mechanism for quiescent coronal rain along open structures facilitated by interchange reconnection. The results suggest that the quiescent coronal rain facilitated by interchange reconnection between open and closed field lines deserves more attention.
arXiv comment22 pages, 12 figures, 1 table, accepted for publication in RAA
References in corpus (40)
- The Interface Region Imaging Spectrograph (IRIS)
- Multi-scale Gaussian normalization for solar image processing
- Observing the fine structure of loops through high resolution spectroscopic observations of coronal rain with the CRISP instrument at the Swedish Solar Telescope
- JHelioviewer - Time-dependent 3D visualisation of solar and heliospheric data
- Coronal rain as a marker for coronal heating mechanisms
- The multi-thermal and multi-stranded nature of coronal rain
- Dynamics of solar coronal loops II. Catastrophic cooling and high-speed downflows
- Transverse oscillations of loops with coronal rain observed by Hinode/SOT
- Some interesting topics provoked by the solar filament research in the past decade
- Dynamics of coronal rain and descending plasma blobs in solar prominences: II. partially ionized case
- Explosive Chromospheric Evaporation in a Circular-ribbon Flare
- On-disk coronal rain
- Observations of Solar Coronal Rain in Null Point Topologies
- Coronal condensations caused by magnetic reconnection between solar coronal loops
- Unresolved fine-scale structure in solar coronal loop-tops
- The Coronal Monsoon: Thermal Nonequilibrium Revealed by Periodic Coronal Rain
- Round-trip Slipping Motion of the Circular Flare Ribbon Evidenced in a Fan-spine Jet
- Dynamics of coronal rain and descending plasma blobs in solar prominences: I. Fully ionised case
- Continuous upflows and sporadic downflows observed in active regions
- Multi-episode chromospheric evaporation observed in a solar flare
- From Pseudostreamer Jets to CMEs: Observations of the Breakout Continuum
- Observing the formation of flare-driven coronal rain
- On the Brightening Propagation of Post-Flare Loops Observed by TRACE
- Quasi-periodic Fast Propagating Magnetoacoustic Waves during the Magnetic Reconnection Between Solar Coronal Loops
- A secondary fan-spine magnetic structure in active region 11897
- Multi-scale observations of thermal non-equilibrium cycles in coronal loops
- Explosive chromospheric evaporation driven by nonthermal electrons around one footpoint of a solar flare loop
- An explanation of remarkable emission line profiles in post-flare coronal rain
- First High-resolution Spectroscopic Observations of an Erupting Prominence Within a Coronal Mass Ejection by the Interface Region Imaging Spectrograph (IRIS)
- Formation and evolution of coronal rain observed by SDO/AIA on February 22, 2012
- Automated Spatiotemporal Analysis of Fibrils and Coronal Rain using the Rolling Hough Transform
- Formation of coronal rain triggered by impulsive heating associated with magnetic reconnection
- Neutral Helium Triplet Spectroscopy of Quiescent Coronal Rain with Sensitivity Estimates for Spectropolarimetric Magnetic Field Diagnostics
- Heating and cooling of coronal loops observed by SDO
- Relation of coronal rain originating from coronal condensations to interchange magnetic reconnection
- On-disk solar coronal condensations facilitated by magnetic reconnection between open and closed magnetic structures
- Magnetic reconnection between loops accelerated by a nearby filament eruption
- Temporal and Spatial Scales in Coronal Rain Revealed by UV Imaging and Spectroscopic Observations
- Two Types of Dynamic Cool Coronal Structures Observed with STEREO and HINODE
- Measurement of the polytropic index during solar coronal rain using a diagram of the electron density distribution as a function of the electron temperature
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- Coronal rain in randomly heated arcades
- Reconfiguration and eruption of a solar filament by magnetic reconnection with an emerging magnetic field
- Heating of quiescent coronal loops caused by nearby eruptions observed with the Solar Dynamics Observatory and the Solar Upper Transition Region Imager
- Imaging and Spectroscopic Observations of the Dynamic Processes in Limb Solar Flares