Abstract
Recent high-resolution imaging-spectroscopy data of a solar active region obtained with the Swedish 1-m Solar Telescope on La Palma, show very bright, flame-like features that appear intermittently in a region with moat flows and likely some flux emergence. Observed in the wings of the Balmer Halpha line, these features show up at regular bright points outlining magnetic network, but flare upward with much larger brightness and distinct "jet" morphology as seen from aside in the limbward view of these data.
Based on their spectral properties these features can be classified as Ellerman bombs, which are short-lived but prominent brightness enhancements of the outer wings of strong optical lines observed in flux emergence regions on the Sun. In this talk, I will present the results of a recent morphological study of these jet features. Their observed properties support the idea of deep-seated photospheric reconnection of emergent or moat-driven magnetic flux with pre- existing strong vertical network fields as the mechanism underlying the Ellerman bomb phenomenon.