Ellerman bombs at high resolution. IV. Visibility in Na I and Mg I

Abstract

Ellerman bombs are transient brightenings of the wings of the solar Balmer lines that mark reconnection in the photosphere. Ellerman noted in 1917 that he did not observe such brightenings in the Na I D and Mg I b lines. This non-visibility should constrain EB interpretation, but has not been addressed in published bomb modeling. We therefore test Ellerman's observation and confirm it using high-quality imaging spectrometry with the Swedish 1-m Solar Telescope. However, we find diffuse brightness in these lines that seems to result from prior EBs. We tentatively suggest this is a post-bomb hot-cloud phenomenon also found in recent EB spectroscopy in the ultraviolet.

Accepted by ApJ

References in corpus (6)

• The Interface Region Imaging Spectrograph (IRIS)
• CRISP Spectropolarimetric Imaging of Penumbral Fine Structure
• CRISPRED: A data pipeline for the CRISP imaging spectropolarimeter
• Ellerman Bombs at high resolution: II. Visibility, triggering and effect on upper atmosphere
• Ellerman bombs: fallacies, fads, usage
• Observations and NLTE modeling of Ellerman bombs

Cited by in corpus (17)

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• Simulating Ellerman bomb-like event
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• 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
• Observations of Ellerman bomb emission features in He I D3 and He I 10830 Å
• Photospheric response to EB-like event
• Multi-wavelength Spectral Analysis of Ellerman Bombs Observed by FISS and IRIS
• A Cancellation Nanoflare Model for Solar Chromospheric and Coronal Heating III. 3D Simulations and Atmospheric Response
• Solar polarimetry through the K I lines at 770 nm
• RADYN simulations of non-thermal and thermal models of Ellerman bombs
• Automating Ellerman bomb detection in ultraviolet continua
• Study of the polarization produced by the Zeeman effect in the solar Mg I b lines
• The Ellerman bomb and Ultraviolet burst triggered successively by an emerging magnetic flux rope
• Revisiting the Spectral Features of Ellerman Bombs and UV Bursts. I. Radiative Hydrodynamic Simulations