Observations of Ellerman bombs in H-alpha

Details Observations of Ellerman bombs in H-alpha Observations of Ellerman bombs in H-alpha

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..108..227z&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 108, no. 2, 1987, p. 227-236.

Physics

20

Chromosphere, H Alpha Line, Solar Activity, Magnetic Flux, Radiant Flux Density, Sunspots, Time Dependence

Scientific paper

A developing active region near the center of the solar disk was observed for 80 min at the center and the wings of H-alpha. Ellerman bombs lying both below an Arch Filament System and near sunspots were studied at H-alpha (1.0 and 0.75 A). Their average contrast, lifetime, size were determined, and their flux was studied as a function of time. Evidence was found that the size of Ellerman bombs increases with height. The time curves of flux provide evidence for both impulsive and gradual energy release. Under the Arch Filament Systems, the Ellerman bombs form a cellular pattern with a characteristic size of 3100 km. Fifty percent of the bombs appear and disappear in pairs, possibly associated with bipolar emerging magnetic flux tubes.

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