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Paper detail

Properties of a Decaying Sunspot

A small decaying sunspot was observed with the Vacuum Tower Telescope (VTT) on Tenerife and the Japanese Hinode satellite. We obtained full Stokes scans in several wavelengths covering different heights in the solar atmosphere. Imaging time series from Hinode and the Solar Dynamics Observatory (SDO) complete our data sets. The spot is surrounded by a moat flow, which persists also on that side of the spot where the penumbra already had disappeared. Close to the spot, we find a chromospheric location with downflows of more than 10 km/s without photospheric counterpart. The height dependence of the vertical component of the magnetic field strength is determined in two different ways that yielded different results in previous investigations. Such a difference still exists in our present data, but it is not as pronounced as in the past.

preprint2013arXivOpen access
H. BalthasarC. BeckP. GömöryK. MuglachK. G. PuschmannT. ShimizuM. Verma
astro-ph.SR
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H. BalthasarC. BeckP. GömöryK. MuglachK. G. PuschmannT. ShimizuM. Verma

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