Light Walls Around Sunspots Observed by the Interface Region Imaging Spectrograph

Abstract

The Interface Region Imaging Spectrograph (IRIS) mission provides high-resolution observations of the chromosphere and transition region. We try to determine whether the light walls exist somewhere else in active regions besides light bridges. Employing half-year high tempo-spatial data from the IRIS, we find lots of light walls either around sunspots or above light bridges. For the first time, we report one light wall near an umbral-penumbral boundary and another along a neutral line between two small sunspots. These new observations reveal that these light walls are multi-layer and multi-thermal structures which occur along magnetic neutral lines in active regions.

arXiv comment4 pages, 4 figures, Accepted for publication in A&A Letters

References in corpus (11)

• The Interface Region Imaging Spectrograph (IRIS)
• Hot Explosions in the Cool Atmosphere of the Sun
• High-resolution Observations of the Shock Wave Behavior for Sunspot Oscillations with the Interface Region Imaging Spectrograph
• Plasma Ejections from a Light Bridge in a Sunspot Umbra
• Fan-shaped jets above the light bridge of a sunspot driven by reconnection
• Detection of opposite polarities in a sunspot light bridge: evidence of low-altitude magnetic reconnection
• Oscillating light wall above a sunspot light bridge
• Fine Structures and Overlying Loops of Confined Solar Flares
• Solar transition region above sunspots
• Conversion from mutual helicity to self-helicity observed with IRIS
• High-resolution Observations of a Flux Rope with the Interface Region Imaging Spectrograph

Cited by in corpus (17)

• Frequently Occurring Reconnection Jets from Sunspot Light Bridges
• Surge-like oscillations above sunspot light bridges driven by magnetoacoustic shocks
• First Perihelion of EUI on the Solar Orbiter mission
• Enhancement of a sunspot light wall with external disturbances
• Signatures of magnetic reconnection at the footpoints of fan shape jets on a light bridge driven by photospheric convective motions
• A solar flare disturbing a light wall above a sunspot light bridge
• The chromosphere above a $\delta$-sunspot in the presence of fan-shaped jets
• Observations of upward propagating waves in the transition region and corona above Sunspots
• Sunspot Light Walls Suppressed by Nearby Brightenings
• Sunspot penumbral filaments intruding into a light bridge and the resultant reconnection jets
• Transition region loops in the very late phase of flux-emergence in IRIS sit-and-stare observations
• Dynamics in the transition region beneath active region upflows viewed by IRIS
• Chromospheric recurrent jets in a sunspot group and their inter-granular origin
• Small-scale Bright Blobs Ejected from a Sunspot Light Bridge
• Can Injection Model Replenish the Filaments in Weak Magnetic Environment?
• Various Activities above Sunspot Light Bridges in IRIS Observations: Classification and Comparison
• A new view of the solar interface region from the Interface Region Imaging Spectrograph (IRIS)