436 citations · 1k across the 17 of their papers we have counts for
17 papers
Measurements of Photospheric and Chromospheric Magnetic Field Structures Associated with Chromospheric Heating over a Solar Plage Region
Tetsu Anan, Thomas A. Schad, Reizaburo Kitai +6
In order to investigate the relation between magnetic structures and the signatures of heating in plage regions, we observed a plage region with the He I 1083.0 nm and Si I 1082.7…
A Three-Dimensional Velocity of an Erupting Prominence Prior to a Coronal Mass Ejection
Maria V. Gutierrez, Kenichi Otsuji, Ayumi Asai +10
We present a detailed three-dimensional (3D) view of a prominence eruption, coronal loop expansion, and coronal mass ejections (CMEs) associated with an M4.4 flare that occurred on…
"Dandelion" Filament Eruption and Coronal Waves Associated with a Solar Flare on 2011 February 16
Denis P. Cabezas, Lurdes M. Martínez, Yovanny J. Buleje +11
Coronal disturbances associated with solar flares, such as H Moreton waves, X-ray waves, and extreme ultraviolet (EUV) coronal waves are discussed herein in relation to magnetoh…
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…
First Simultaneous Observation of H-alpha Moreton Wave, EUV Wave, and Filament/Prominence Oscillations
Ayumi Asai, Takako T. Ishii, Hiroaki Isobe +9
We report on the first simultaneous observation of an H-alpha Moreton wave, the corresponding EUV fast coronal waves, and a slow and bright EUV wave (typical EIT wave). Associated…
A Study on Red Asymmetry of H-alpha Flare Ribbons Using Narrowband Filtergram in the 2001 April 10 Solar Flare
Ayumi Asai, Kiyoshi Ichimoto, Reizaburo Kitai +2
We report a detailed examination of the "red asymmetry" of H-alpha emission line seen during the 2001 April 10 solar flare by using a narrowband filtergram. We investigated the tem…
Statistical Study on the Nature of Solar Flux Emergence
Kenichi Otsuji, Reizaburo Kitai, Kiyoshi Ichimoto +1
We studied 101 flux emergence events ranging from small ephemeral regions to large emerging flux regions which were observed with Hinode Solar Optical Telescope filtergram. We inve…
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…
Ca II K Spectral Study of an Emerging Flux Region using Domeless Solar Telescope in Hida Observatory
Kenichi Otsuji, Reizaburo Kitai, Takuma Matsumoto +5
A cooperative observation with Hida observatory and Hinode satellite was performed on an emerging flux region. The successive Ca II K spectro-heliograms of the emerging flux region…
Temporal power spectra of the horizontal velocity of the solar photosphere
Takuma Matsumoto, Reizaburo Kitai
We have derived the temporal power spectra of the horizontal velocity of the solar photosphere. The data sets for 14 quiet regions observed with the Gband filter of Hinode/SOT are…
Spectroscopic Studies of Limb Spicules. I. Radial and Turbulent Velocities
Makiko Shoji, Takara Nishikawa, Reizaburo Kitai +1
We made high-resolution spectroscopic observations of limb-spicules in H-alpha using the Vertical Spectrograph of Domeless Solar Telescope at Hida Observatory. While more than half…
Spicule Dynamics over Plage Region
Tetsu Anan, Reizaburo Kitai, Tomoko Kawate +14
We studied spicular jets over a plage area and derived their dynamic characteristics using Hinode Solar Optical Telescope (SOT) high-resolution images. The target plage region was…
Observations of Chromospheric Anemone Jets with Hinode SOT and Hida Ca II Spectroheliogram
Satoshi Morita, Kazunari Shibata, Satoru Ueno +3
We present the first simultaneous observations of chromospheric "anemone" jets in solar active regions with Hinode SOT Ca II H broadband filetergram and Ca II K spetroheliogram on…
Magnetic Structure of Umbral Dots Observed with Hinode Solar Optical Telescope
Hiroko Watanabe, Reizaburo Kitai, Kiyoshi Ichimoto +1
High resolution and seeing-free spectroscopic observation of a decaying sunspot was done with the Solar Optical Telescope aboard Hinode satellite. The target was NOAA 10944 located…
Chromospheric Anemone Jets as Evidence of Ubiquitous Reconnection
Kazunari Shibata, Tahei Nakamura, Takuma Matsumoto +19
The heating of the solar chromosphere and corona is a long-standing puzzle in solar physics. Hinode observations show the ubiquitous presence of chromospheric anemone jets outside…
Umbral Fine Structures in Sunspots Observed with Hinode Solar Optical Telescope
Reizaburo Kitai, Hiroko Watanabe, Tahei Nakamura +15
High resolution imaging observation of a sunspot umbra was done with Hinode Solar Optical Telescope (SOT). Filtergrams in wavelengths of blue and green continuum were taken during…
Small Scale Magnetic Flux Emergence Observed with Hinode/Solar Optical Telescope
Kenichi Otsuji, Kazunari Shibata, Reizaburo Kitai +14
We observed small scale magnetic flux emergence in a sunspot moat region by the Solar Optical Telescope (SOT) aboard the Hinode satellite. We analyzed filtergram images observed in…