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Abstract: The solar atmosphere contains a wide variety of small-scale transientfeatures. Here, we explore the inter-relation between some of them such assurges, explosive events and blinkers via simultaneous spectral and imagingdata taken with the TRACE imager, the SUMER, and CDS spectrometers on boardSoHO, and SVST La Palma. The alignment of all data both in time and solar XYshows that SUMER line profiles, which are attributed to explosive events, aredue to a surge phenomenon. The surge is triggered, most probably, by one ormore Elerman bombs which are best visible in Halpha +-350 A but were alsoregistered by TRACE Fe IX-X 171 A and correspond to a strong radiance increasein the CDS Mg IX 368.07 A line. With the present study we demonstrate that thedivision of small-scale transient events into a number of different subgroups,for instance explosive events, blinkers, spicules, surges or just brightenings,is ambiguous, implying that the definition of a feature based only on eitherspectroscopic or imaging characteristics as well as insufficient spectral andspatial resolution can be incomplete.

Autor: M.S. Madjarska, J.G. Doyle, B. de Pontieu

Fuente: https://arxiv.org/

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