Magnetic Flux Cancellation in Ellerman Bombs

Abstract

Ellerman Bombs (EBs) are often found co-spatial with bipolar photospheric magnetic fields. We use H$\alpha$ imaging spectroscopy along with Fe I 6302.5 Å spectro-polarimetry from the Swedish 1-m Solar Telescope (SST), combined with data from the Solar Dynamic Observatory (SDO) to study EBs and the evolution of the local magnetic fields at EB locations. The EBs are found via an EB detection and tracking algorithm. We find, using NICOLE inversions of the spectro-polarimetric data, that on average (3.43 $\pm$ 0.49) x 10${}^{24}$ ergs of stored magnetic energy disappears from the bipolar region during the EBs burning. The inversions also show flux cancellation rates of 10${}^{14}$ - 10${}^{15}$ Mx s${}^{-1}$, and temperature enhancements of 200 K at the detection footpoints. We investigate near-simultaneous flaring of EBs due to co-temporal flux emergence from a sunspot, which shows a decrease in transverse velocity when interacting with an existing, stationary area of opposite polarity magnetic flux and the EBs are formed. We also show that these EBs can get fueled further by additional, faster moving, negative magnetic flux regions.

arXiv comment5 Figures, 1 Movie, Accepted in ApJ

References in corpus (24)

• CRISP Spectropolarimetric Imaging of Penumbral Fine Structure
• Hot Explosions in the Cool Atmosphere of the Sun
• CRISPRED: A data pipeline for the CRISP imaging spectropolarimeter
• An Open Source, Massively Parallel Code for Non-LTE Synthesis and Inversion of Spectral Lines and Zeeman-induced Stokes Profiles
• Ellerman Bombs at high resolution: I. Morphological evidence for photospheric reconnection
• The intensity contrast of solar granulation: comparing Hinode SP results with MHD simulations
• Spatially coupled inversion of spectro-polarimetric image data I: Method and first results
• Ellerman bombs at high resolution III. Simultaneous observations with IRIS and SST
• Ellerman Bombs at high resolution: II. Visibility, triggering and effect on upper atmosphere
• Ellerman bombs: fallacies, fads, usage
• DELO-Bezier formal solutions of the polarized radiative transfer equation
• 3D Temperature Mapping of Solar Photospheric Fine Structure Using Ca II H Filtergrams
• Spectro-Polarimetric Observation of an Emerging Flux Region: Triggering Mechanism of Ellerman Bombs
• Stokes imaging polarimetry using image restoration at the Swedish 1-m Solar Telescope
• Ellerman Bombs - Evidence for Magnetic Reconnection in the Lower Solar Atmosphere
• Spectral observations of Ellerman bombs and fitting with a two-cloud model
• Small-Scale Structuring Of Ellerman Bombs at Solar Limb
• UV spectra, bombs, and the solar atmosphere
• Spectro-polarimetric observations and non-LTE Modeling of Ellerman bombs
• Statistical Analysis of Small Ellerman Bomb Events
• Observations and NLTE modeling of Ellerman bombs
• Ellerman Bombs with Jets: Cause and Effect
• Stokes imaging polarimetry using image restoration: A calibration strategy for Fabry-Pérot based instruments
• Diagnostics of Ellerman Bombs with High-resolution Spectral Data

Cited by in corpus (38)

• Bombs and flares at the surface and lower atmosphere of the Sun
• Solar ultraviolet bursts
• Critical Science Plan for the Daniel K. Inouye Solar Telescope (DKIST)
• Reconnection brightenings in the quiet solar photosphere
• Magnetic reconnection at the earliest stage of solar flux emergence
• Simulating Ellerman bomb-like event
• IRIS Burst Spectra Co-Spatial To A Quiet-Sun Ellerman-Like Brightening
• A Cancellation Nanoflare Model for Solar Chromospheric and Coronal Heating II. 2D Theory and Simulations
• A Tale of Two Emergences: Sunrise II Observations of Emergence Sites in a Solar Active Region
• Observations of Ellerman bomb emission features in He I D3 and He I 10830 Å
• On The Relationship Between Magnetic Cancellation and UV Burst Formation
• Photospheric response to EB-like event
• Multi-wavelength Spectral Analysis of Ellerman Bombs Observed by FISS and IRIS
• Solar Ellerman Bombs in 1-D Radiative Hydrodynamics
• A Cancellation Nanoflare Model for Solar Chromospheric and Coronal Heating III. 3D Simulations and Atmospheric Response
• RADYN simulations of non-thermal and thermal models of Ellerman bombs
• Automating Ellerman bomb detection in ultraviolet continua
• Signatures of quiet Sun reconnection events in Ca~{\sc ii}, H$\alpha$ and Fe~{\sc i}
• Spatially resolved signatures of bi-directional flows observed in inverted-Y shaped jets
• Cancellation of Small-Scale Magnetic Features
• Power-law energy distributions of small-scale impulsive events on the active Sun: Results from IRIS
• Small-scale magnetic flux emergence preceding a chain of energetic solar atmospheric events
• Chromospheric and coronal heating and jet acceleration due to reconnection driven by flux cancellation. II. Cancellation of two magnetic polarities of unequal flux
• Magnetic Topology of quiet-Sun Ellerman bombs and associated Ultraviolet brightenings
• Ca II 8542 Å brightenings induced by a solar microflare
• A reconnection driven magnetic flux cancellation and a quiet Sun Ellerman bomb
• High-Resolution Observations of a Small-Scale Cancellation Nanoflare: Supporting Evidence for the Cancellation Nanoflare Model
• Chromospheric Inversions of a Micro-flaring Region
• An Observational Test of Solar Plasma Heating by Magnetic Flux Cancellation
• Onset of 2D magnetic reconnection in the solar photosphere, chromosphere and corona
• Automatic detection of Ellerman bombs using Deep Learning
• Chromospheric cannonballs on the Sun
• IRIS burst properties in active regions
• High $\beta$ magnetic reconnection at different altitudes in the cool low solar atmosphere
• Automatic detection of Ellerman bombs in the H$\alpha$ line
• Revisiting the Spectral Features of Ellerman Bombs and UV Bursts. I. Radiative Hydrodynamic Simulations
• High-resolution spectropolarimetric observations of the temporal evolution of magnetic fields in photospheric bright points
• A multi-instrument study of ultraviolet bursts and associated surges in AR 12957