38 citations · 71 across the 6 of their papers we have counts for
7 papers · 1 filter
Magnetic field diagnostics of a solar active region filament
Daiki Yamasaki, Yu Wei Huang, Yuki Hashimoto +2
We performed spectropolarimetric observations of an active region filament in He I 10830 angstrom and Si I 10827 angstrom lines to investigate its magnetic field structure. We carr…
Detection of Doppler velocity differences between ions and neutrals in an erupting prominence
Yuwei Huang, Kiyoshi Ichimoto, Tetsu Anan
We performed a spectroscopic observation of an erupting prominence occurred on the solar limb on 2015 May 8th in He I 706.5 nm, O I 777.2 nm triplet and Ca II 849.8 nm lines to inv…
A fast-filament eruption observed in the H spectral line. I. Imaging spectroscopy diagnostic
Denis P. Cabezas, Kiyoshi Ichimoto, Ayumi Asai +4
Context. Solar filament eruptions usually appear to occur in association with the sudden explosive release of magnetic energy accumulated in long-lived arched magnetic structures.…
Temporal evolution and spatial distribution of white-light flare kernels in a solar flare
Tomoko Kawate, Takako T. Ishii, Yoshikazu Nakatani +4
On 2011 September 6, we observed an X2.1-class flare in continuum and H with a frame rate of about 30~Hz. After processing images of the event by using a speckle-masking image r…
Diagnosis of Magnetic and Electric Fields of Chromospheric Jets through Spectropolarimetric Observations of HI Paschen Lines
Tetsu Anan, Roberto Casini, Kiyoshi Ichimoto
Magnetic fields govern the plasma dynamics in the outer layers of the solar atmosphere, and electric fields acting on neutral atoms that move across the magnetic field enable us to…
Center-to-Limb Variation of Radio Emissions from Thermal-Rich and Thermal-Poor Solar Flares
Tomoko Kawate, Ayumi Asai, Ichimoto Kiyoshi
A statistical analysis of radio flare events was performed by using the event list of Nobeyama Radioheliograph in 1996-2009. We examined center-to-limb variations of 17GHz and 34GH…
Characteristic Dependence of Umbral Dots on their Magnetic Structure
Hiroko Watanabe, Reizaburo Kitai, Kiyoshi Ichimoto
Umbral dots (UDs) were observed in a stable sunspot in NOAA 10944 by the Hinode Solar Optical Telescope on 2007 March 1. The observation program consisted of blue continuum images…