171 citations · 2k across the 48 of their papers we have counts for
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Numerical Study of a Propagating Non-Thermal Microwave Feature in a Solar Flare Loop
T. Minoshima, T. Yokoyama
We analytically and numerically study the motion of electrons along a magnetic loop, to compare with the observation of the propagating feature of the non-thermal microwave source…
Emergence of a Helical Flux Rope Under an Active Region Prominence
Takenori J. Okamoto, Saku Tsuneta, Bruce W. Lites +12
Continuous observations were obtained of active region 10953 with the Solar Optical Telescope (SOT) on board the \emph{Hinode} satellite during 2007 April 28 to May 9. A prominence…
Comparative Analysis of Non-thermal Emissions and Study of Electron Transport in a Solar Flare
T. Minoshima, T. Yokoyama, N. Mitani
We study the non-thermal emissions in a solar flare occurring on 2003 May 29 by using RHESSI hard X-ray (HXR) and Nobeyama microwave observations. This flare shows several typical…
Hinode Observations of Vector Magnetic Field Change Associated with a Flare on 2006 December 13
Masahito Kubo, Takaaki Yokoyama, Yukio Katsukawa +10
Continuous observations of a flare productive active region 10930 were successfully carried out with the Solar Optical Telescope onboard the Hinode spacecraft during 2007 December…
Triggering Mechanism for the Filament Eruption on 2005 September 13 in Active Region NOAA 10808
Kaori Nagashima, Hiroaki Isobe, Takaaki Yokoyama +3
On 2005 September 13 a filament eruption accompanied by a halo CME occurred in the most flare-productive active region NOAA 10808 in Solar Cycle 23. Using multi-wavelength observat…
The Origin of Ripples in Cool Cores of Galaxy Clusters: Heating by MHD Waves?
Yutaka Fujita, Takeru K. Suzuki, Takahiro Kudoh +1
We consider MHD waves as a heating source of cool cores of galaxy clusters. In particular, we focus on transverse waves (Alfven waves), because they can propagate a longer distance…
Two-dimensional MHD simulations of relativistic magnetic reconnection
Naoyuki Watanabe, Takaaki Yokoyama
It has been recognized that magnetic reconnection process is of great importance in high-energy astrophysics. We develop a new two-dimensional relativistic resistive magnetohydrody…
Statistical Study of the Reconnection Rate in Solar Flares Observed with YOHKOH/SXT
Kaori Nagashima, Takaaki Yokoyama
We report a statistical study of flares observed with the Soft X-ray Telescope (SXT) onboard Yohkoh in the year of 2000. We measure physical parameters of 77 flares, such as the te…
GEOTAIL observation of the SGR1806-20 Giant Flare: The first 600 ms
Toshio Terasawa, Yasuyuki Tanaka, Yasuhiro Takei +14
On December 27, 2004, plasma particle detectors on the GEOTAIL spacecraft detected an extremely strong signal of hard X-ray photons from the giant flare of SGR1806-20, a magnetar c…
Difference between Spatial Distributions of the H-alpha Kernels and Hard X-Ray Sources in a Solar Flare
Ayumi Asai, Satoshi Masuda, Takaaki Yokoyama +4
We present the relation of the spatial distribution of H-alpha kernels with the distribution of hard X-ray (HXR) sources seen during the 2001 April 10 solar flare. This flare was o…
Magnetic Reconnection Triggered by the Parker Instability in the Galaxy: Two-Dimensional Numerical Magnetohydrodynamic Simulations and Application to the Origin of X-Ray Gas in the Galactic Halo
S. Tanuma, T. Yokoyama, T. Kudoh +1
We propose the Galactic flare model for the origin of the X-ray gas in the Galactic halo. For this purpose, we examine the magnetic reconnection triggered by Parker instability (ma…
A HR-like Diagram for Solar/Stellar Flares and Corona -- Emission Measure vs Temperature Diagram
Kazunari Shibata, Takaaki Yokoyama
In our previous paper, we have presented a theory to explain the observed universal correlation between the emission measure () and temperature (T) for solar/stellar flar…
Periodic Acceleration of Electrons in the 1998 November 10 Solar Flare
A. Asai, M. Shimojo, H. Isobe +4
We present an examination of the multi-wavelength observation of a C7.9 flare which occurred on 1998 November 10. This is the first time of imaging observation of the quasi-periodi…
Two-Dimensional MHD Numerical Simulations of Magnetic Reconnection Triggered by A Supernova Shock in Interstellar Medium, Generation of X-Ray Gas in Galaxy
Syuniti Tanuma, Takaaki Yokoyama, Takahiro Kudoh +1
We examine the magnetic reconnection triggered by a supernova (or a point explosion) in interstellar medium, by performing two-dimensional resistive magnetohydrodynamic (MHD) numer…