ELLERMAN BOMBS AT HIGH RESOLUTION. IV. VISIBILITY IN Na I AND Mg I

Journal Article · Sat Aug 01 00:00:00 EDT 2015 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/808/2/133· OSTI ID:22525653

Rutten, R. J.; Vissers, G. J. M., ^[1]

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1. Institute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029, Blindern, N-0315 Oslo (Norway)

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 a 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.

• OSTI ID: 22525653
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 808; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BALMER LINES
BRIGHTNESS
CLOUDS
EMISSION SPECTROSCOPY
MAGNESIUM IONS
MAGNETIC FIELDS
MAGNETIC RECONNECTION
PHOTOSPHERE
RESOLUTION
SODIUM IONS
SUN
TELESCOPES
TRANSIENTS
ULTRAVIOLET RADIATION
VISIBILITY