Poster abstract details

Mini-Filaments - Small-Scale Analogues of Solar Eruptive Events?
C. Denker and A. Tritschler

Abstract

Mini-filaments are a small-scale phenomenon of the solar chromosphere and they frequently occur across the entire disk. They share a variety of characteristics with their larger-scale cousins and may serve as a proxy for more complex systems. They play an important role in the energy and mass supply to the corona. In the case of small-scale eruptive filaments, only a single, small-scale loop system is involved. Furthermore, they are supported by simple magnetic field configurations, either magnetic bipoles or well-defined multipoles, easing their theoretical description. Since mini-filaments are small (just a few tens of seconds of arc) but highly dynamic (eruptions can occur within just a few minutes), they are an ideal target for high-resolution two-dimensional spectroscopy. We report of observations obtained with the Interferometric Bidimensional Spectrometer (IBIS) at the Dunn Solar Telescope (DST) of the National Solar Observatory/Sacramento Peak (NSO/SP) in May 2008. The data consist of full Stokes measurements in the Fe\,{\sc i} $\lambda$630.2 nm and Ca\,{\sc ii} $\lambda$854.2 nm line as well as H$\alpha$ spectroscopy with high temporal resolution. The spectroscopic data is complemented by speckle-reconstructed white-light and G-band images. We present a preliminary analysis of these data to demonstrate of how chromospheric small-scale phenoma can serve as building blocks for our understanding of solar eruptive events such as filament/prominence eruptions and coronal mass ejections (CMEs).