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Alfred de Wijn (NCAR/HAO)20/06/2016, 14:20The Chromosphere and Prominence Magnetometer (ChroMag) is an instrument with the goal of quantifying the intertwined dynamics and magnetism of the solar chromosphere and in prominences through imaging spectro-polarimetry of the full solar disk in a synoptic fashion. The picture of chromospheric magnetism and dynamics is rapidly developing, and a pressing need exists for...Go to contribution page
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Jayant Joshi (ISP Stockholm)20/06/2016, 14:50We studied magnetic field structure of a sunspot penumbra in the upper chromosphere and compared it to that in the photosphere. High spatial resolution spectropolarimetric observations were recorded with the 1.5-meter GREGOR telescope using the GREGOR Infrared Spectrograph (GRIS). The observed spectral domain includes the upper chromospheric He I triplet at 10830 Å and...Go to contribution page
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Christopher Nelson (University of Sheffield & Queen's University Belfast)20/06/2016, 15:10Modern high-resolution observations have highlighted the ubiquity of small-scale structures in sunspot umbrae. Umbral micro-jets, extended bright features which were originally identified within Ca II H filtergrams, are one interesting example of such structuring. These bright elongated events have been shown to occur on sub-arcsecond scales, have lifetimes of the order minutes, and to...Go to contribution page
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