236 citations · 1.4k across the 54 of their papers we have counts for
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astro-ph.SR2011★ 46 cited
Kink waves in an active region dynamic fibril
A. Pietarila, R. Aznar Cuadrado, J. Hirzberger +1
We present high spatial and temporal resolution Ca II 8542 observations of a kink wave in an on-disk chromospheric active region fibril. The properties of the wave are similar to t…
astro-ph.SR2011★ 52 cited
Convective Nature of Sunspot Penumbral Filaments: Discovery of Downflows in the Deep Photosphere
Jayant Joshi, A. Pietarila, J. Hirzberger +3
We study the velocity structure of penumbral filaments in the deep photosphere to obtain direct evidence for the convective nature of sunspot penumbrae. A sunspot was observed at h…