436 citations · 1.2k across the 20 of their papers we have counts for
10 papers · 1 filter
Observations of Umbral Dots and their Physical Models
Hiroko Watanabe
The Hinode satellite opens a new era to the sunspots research, because of its high spatial resolution and temporal stability. Fine scale structures in sunspots, called umbral dots…
Morphological study of penumbral formation
Reizaburo Kitai, Hiroko Watanabe, Ken'ichi Otsuji
Penumbrae are known to be area of mainly horizontal magnetic field surrounding umbrae of relatively large and mature sunspots. In this paper, we observationally studied the formati…
Temporal Evolution of Velocity and Magnetic Field in and around Umbral Dots
Hiroko Watanabe, Luis R. Bellot Rubio, Jaime de la Cruz Rodriguez +1
We study the temporal evolution of umbral dots (UDs) using measurements from the CRISP imaging spectropolarimeter at the Swedish 1-m Solar Telescope. Scans of the magnetically sens…
Ubiquitous torsional motions in type II spicules
B. De Pontieu, M. Carlsson, L. H. M. Rouppe van der Voort +3
Spicules are long, thin, highly dynamic features that jut out ubiquitously from the solar limb. They dominate the interface between the chromosphere and corona and may provide sign…
Properties of Umbral Dots as Measured from the New Solar Telescope Data and MHD Simulations
A. Kilcik, V. B. Yurchyshyn, M. Rempel +5
We studied bright umbral dots (UDs) detected in a moderate size sunspot and compared their statistical properties to recent MHD models. The study is based on high resolution data r…
Ellerman Bombs at high resolution: I. Morphological evidence for photospheric reconnection
Hiroko Watanabe, Gregal Vissers, Reizaburo Kitai +2
High-resolution imaging-spectroscopy movies of solar active region NOAA 10998 obtained with the CRisp Imaging SpectroPolarimeter (CRISP) at the Swedish 1-m Solar Telescope show ver…