130 citations · 332 across the 8 of their papers we have counts for
8 papers
Empirical Optimization of the Source-Surface Height in the PFSS extrapolation
Munehito Shoda, Kyogo Tokoro, Daikou Shiota +1
The potential field source surface (PFSS) method is a widely used magnetic field extrapolation technique in the space weather community. The only free parameter in the PFSS method…
Comparison of Polar Magnetic Fields Derived from MILOS and MERLIN Inversions with Hinode/SOT-SP Data
Masahito Kubo, Daikou Shiota, Yukio Katsukawa +8
The detailed investigation of the polar magnetic field and its time evolution is one of the major achievements of Hinode. Precise measurements of the polar magnetic field are essen…
The Solar and Geomagnetic Storms in May 2024: A Flash Data Report
Hisashi Hayakawa, Yusuke Ebihara, Alexander Mishev +16
In May 2024, the scientific community observed intense solar eruptions that resulted in a great geomagnetic storm and auroral extension, highlighting the need to document and quant…
Improvement of solar cycle prediction: Plateau of solar axial dipole moment
H. Iijima, H. Hotta, S. Imada +2
Aims. We report the small temporal variation of the axial dipole moment near the solar minimum and its application to the solar cycle prediction by the surface flux transport (SFT)…
Photospheric Flow Field Related to the Evolution of the Sun's Polar Magnetic Patches Observed by Hinode SOT
Anjali John Kaithakkal, Y. Suematsu, M. Kubo +3
We investigated the role of photospheric plasma motions in the formation and evolution of polar magnetic patches using time-sequence observations with high spatial resolution. The…
Nonlinear Force-Free Extrapolation of the Coronal Magnetic Field Based on the MHD Relaxation Method
S. Inoue, T. Magara, V. S. Pandey +4
We develop a nonlinear force-free field (NLFFF) extrapolation code based on the magnetohydrodynamic (MHD) relaxation method. We extend the classical MHD relaxation method in two im…
The Association of Polar Faculae with Polar Magnetic Patches Examined with Hinode Observations
Anjali John Kaithakkal, Y. Suematsu, M. Kubo +2
The magnetic properties of the Sun's polar faculae are investigated with spectropolarimetric observations of the north polar region obtained by the Hinode satellite in 2007 Septemb…
Buildup and Release of Magnetic Twist during the X3.4 Solar Flare of December 13, 2006
S. Inoue, D. Shiota, T. T. Yamamoto +3
We analyze the temporal evolution of the three-dimensional (3D) magnetic structure of the flaring active region (AR) NOAA 10930 by using the nonlinear force-free fields extrapolate…